BEING CONSCIOUS of the need to preserve the human environment in general and the marine environment in particular,

RECOGNIZING that deliberate, negligent or accidental release of oil and other harmful substances from ships constitutes a serious source of pollution,

RECOGNIZING ALSO the importance of the International Convention for the Prevention of Pollution of the Sea by Oil, 1954, as being the first multilateral instrument to be concluded with the prime objective of protecting the environment, and appreciating the significant contribution which that Convention has made in preserving the seas and coastal environment from pollution,

DESIRING to achieve the complete elimination of intentional pollution of the marine environment by oil and other harmful substances and the minimization of accidental discharge of such substances,

CONSIDERING that this object may best be achieved by establishing rules not limited to oil pollution having a universal purport,

(1) The Parties to the Convention undertake to give effect to the provisions of the present Convention and those Annexes thereto by which they are bound, in order to prevent the pollution of the marine environment by the discharge of harmful substances or effluents containing such substances in contravention of the Convention.

(2) Unless expressly provided otherwise, a reference to the present Convention constitutes at the same time a reference to its Protocols and to the Annexes.

For the purposes of the present Convention, unless expressly provided otherwise:

(1) ‘Regulations’ means the Regulations contained in the Annexes to the present Convention.

(2) ‘Harmful substance’ means any substance which, if introduced into the sea, is liable to create hazards to human health, to harm living resources and marine life, to damage amenities or to interfere with other legitimate uses of the sea, and includes any substance subject to control by the present Convention.

(3) (a) ‘Discharge’, in relation to harmful substances or effluents containing such substances, means any release howsoever caused from a ship and includes any escape, disposal, spilling, leaking, pumping, emitting or emptying;

(i) dumping within the meaning of the Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the exploration, exploitation and associated off-shore processing of sea-bed mineral resources; or

(iii) release of harmful substances for purposes of legitimate scientific research into pollution abatement or control.

(4) ‘Ship’ means a vessel of any type whatsoever operating in the marine environment and includes hydrofoil boats, air-cushion vehicles, submersibles, floating craft and fixed or floating platforms.

(5) ‘Administration’ means the Government of the State under whose authority the ship is operating. With respect to a ship entitled to fly a flag of any State, the Administration is the Government of that State. With respect to fixed or floating platforms engaged in exploration and exploitation of the sea-bed and subsoil thereof adjacent to the coast over which the coastal State exercises sovereign rights for the purposes of exploration and exploitation of their natural resources, the Administration is the Government of the coastal State concerned.

(6) ‘Incident’ means an event involving the actual or probable discharge into the sea of a harmful substance, or effluents containing such a substance.

(7) ‘Organization’ means the Inter-Governmental Maritime Consultative Organization.

(b) ships not entitled to fly the flag of a Party but which operate under the authority of a Party.

(2) Nothing in the present Article shall be construed as derogating from or extending the sovereign rights of the Parties under international law over the sea-bed and subsoil thereof adjacent to their coasts for the purposes of exploration and exploitation of their natural resources.

(3) The present Convention shall not apply to any warship, naval auxiliary or other ship owned or operated by a State and used, for the time being, only on government non-commercial service. However, each Party shall ensure by the adoption of appropriate measures not impairing the operations or operational capabilities of such ships owned or operated by it, that such ships act in a manner consistent, so far as is reasonable and practicable, with the present Convention.

(1) Any violation of the requirements of the present Convention shall be prohibited and sanctions shall be established therefor under the law of the Administration of the ship concerned wherever the violation occurs. If the Administration is informed of such a violation and is satisfied that sufficient evidence is available to enable proceedings to be brought in respect of the alleged violation, it shall cause such proceedings to be taken as soon as possible, in accordance with its law.

(2) Any violation of the requirements of the present Convention within the jurisdiction of any Party to the Convention shall be prohibited and sanctions shall be established therefor under the law of that Party. Whenever such a violation occurs, that Party shall either:

(b) furnish to the Administration of the ship such information and evidence as may be in its possession that a violation has occurred.

(3) Where information or evidence with respect to any violation of the present Convention by a ship is furnished to the Administration of that ship, the Administration shall promptly inform the Party which has furnished the information or evidence, and the Organization, of the action taken.

(4) The penalties specified under the law of a Party pursuant to the present Article shall be adequate in severity to discourage violations of the present Convention and shall be equally severe irrespective of where the violations occur.

(1) Subject to the provisions of paragraph (2) of the present Article a certificate issued under the authority of a Party to the Convention in accordance with the provisions of the Regulations shall be accepted by the other Parties and regarded for all purposes covered by the present Convention as having the same validity as a certificate issued by them.

(2) A ship required to hold a certificate in accordance with the provisions of the Regulations is subject, while in the ports or off-shore terminals under the jurisdiction of a Party, to inspection by officers duly authorized by that Party. Any such inspection shall be limited to verifying that there is on board a valid certificate, unless there are clear grounds for believing that the condition of the ship or its equipment does not correspond substantially with the particulars of that certificate. In that case, or if the ship does not carry a valid certificate, the Party carrying out the inspection shall take such steps as will ensure that the ship shall not sail until it can proceed to sea without presenting an unreasonable threat of harm to the marine environment. That Party may, however, grant such a ship permission to leave the port or off-shore terminal for the purpose of proceeding to the nearest appropriate repair yard available.

(3) If a Party denies a foreign ship entry to the ports or off-shore terminals under its jurisdiction or takes any action against such a ship for the reason that the ship does not comply with the provisions of the present Convention, the Party shall immediately inform the consul or diplomatic representative of the Party whose flag the ship is entitled to fly, or if this is not possible, the Administration of the ship concerned. Before denying entry or taking such action the Party may request consultation with the Administration of the ship concerned. Information shall also be given to the Administration when a ship does not carry a valid certificate in accordance with the provisions of the Regulations.

(4) With respect to the ships of non-Parties to the Convention, Parties shall apply the requirements of the present Convention as may be necessary to ensure that no more favourable treatment is given to such ships.

(1) Parties to the Convention shall co-operate in the detection of violations and the enforcement of the provisions of the present Convention, using all appropriate and practicable measures of detection and environmental monitoring, adequate procedures for reporting and accumulation of evidence.

(2) A ship to which the present Convention applies may, in any port or off-shore terminal of a Party, be subject to inspection by officers appointed or authorized by that Party for the purpose of verifying whether the ship has discharged any harmful substances in violation of the provisions of the Regulations. If an inspection indicates a violation of the Convention, a report shall be forwarded to the Administration for any appropriate action.

(3) Any Party shall furnish to the Administration evidence, if any, that the ship has discharged harmful substances or effluents containing such substances in violation of the provisions of the Regulations. If it is practicable to do so, the competent authority of the former Party shall notify the Master of the ship of the alleged violation.

(4) Upon receiving such evidence, the Administration so informed shall investigate the matter, and may request the other Party to furnish further or better evidence of the alleged contravention. If the Administration is satisfied that sufficient evidence is available to enable proceedings to be brought in respect of the alleged violation, it shall cause such proceedings to be taken in accordance with its law as soon as possible. The Administration shall promptly inform the Party which has reported the alleged violation, as well as the Organization, of the action taken.

(5) A Party may also inspect a ship to which the present Convention applies when it enters the ports or off-shore terminals under its jurisdiction, if a request for an investigation is received from any Party together with sufficient evidence that the ship has discharged harmful substances or effluents containing such substances in any place. The report of such investigation shall be sent to the Party requesting it and to the Administration so that the appropriate action may be taken under the present Convention.

(1) All possible efforts shall be made to avoid a ship being unduly detained or delayed under Article 4, 5 or 6 of the present Convention.

(2) When a ship is unduly detained or delayed under Article 4, 5 or 6 of the present Convention, it shall be entitled to compensation for any loss or damage suffered.

(1) A report of an incident shall be made without delay to the fullest extent possible in accordance with the provisions of Protocol I to the present Convention.

(a) make all arrangements necessary for an appropriate officer or agency to receive and process all reports on incidents; and

(b) notify the Organization with complete details of such arrangements for circulation to other Parties and Member States of the Organization.

(3) Whenever a Party receives a report under the provisions of the present Article, that Party shall relay the report without delay to:

(4) Each Party to the Convention undertakes to issue instructions to its maritime inspection vessels and aircraft and to other appropriate services, to report to its authorities any incident referred to in Protocol I to the present Convention. That Party shall, if it considers it appropriate, report accordingly to the Organization and to any other party concerned.

(1) Upon its entry into force, the present Convention supersedes the International Convention for the Prevention of Pollution of the Sea by Oil, 1954, as amended, as between Parties to that Convention.

(2) Nothing in the present Convention shall prejudice the codification and development of the law of the sea by the United Nations Conference on the Law of the Sea convened pursuant to Resolution 2750 C(XXV) of the General Assembly of the United Nations nor the present or future claims and legal views of any State concerning the law of the sea and the nature and extent of coastal and flag State jurisdiction.

(3) The term ‘jurisdiction’ in the present Convention shall be construed in the light of international law in force at the time of application or interpretation of the present Convention.

Any dispute between two or more Parties to the Convention concerning the interpretation or application of the present Convention shall, if settlement by negotiation between the Parties involved has not been possible, and if these Parties do not otherwise agree, be submitted upon request of any of them to arbitration as set out in Protocol II to the present Convention.

(a) the text of laws, orders, decrees and regulations and other instruments which have been promulgated on the various matters within the scope of the present Convention;

(b) a list of non-governmental agencies which are authorized to act on their behalf in matters relating to the design, construction and equipment of ships carrying harmful substances in accordance with the provisions of the Regulations;

(d) a list of reception facilities including their location, capacity and available facilities and other characteristics;

(e) official reports or summaries of official reports in so far as they show the results of the application of the present Convention; and

(f) an annual statistical report, in a form standardized by the Organization, of penalties actually imposed for infringement of the present Convention.

(2) The Organization shall notify Parties of the receipt of any communications under the present Article and circulate to all Parties any information communicated to it under sub-paragraphs (1)(b) to (f) of the present Article.

(1) Each Administration undertakes to conduct an investigation of any casualty occurring to any of its ships subject to the provisions of the Regulations if such casualty has produced a major deleterious effect upon the marine environment.

(2) Each Party to the Convention undertakes to supply the Organization with information concerning the findings of such investigation, when it judges that such information may assist in determining what changes in the present Convention might be desirable.

(1) The present Convention shall remain open for signature at the Headquarters of the Organization from 15 January 1974 until 31 December 1974 and shall thereafter remain open for accession. States may become Parties to the present Convention by:

(a) signature without reservation as to ratification, acceptance or approval; or

(b) signature subject to ratification, acceptance or approval, followed by ratification, acceptance or approval; or

(2) Ratification, acceptance, approval or accession shall be effected by the deposit of an instrument to that effect with the Secretary-General of the Organization.

(3) The Secretary-General of the Organization shall inform all States which have signed the present Convention or acceded to it of any signature or of the deposit of any new instrument of ratification, acceptance, approval or accession and the date of its deposit.

(1) A State may at the time of signing, ratifying, accepting, approving or acceding to the present Convention declare that it does not accept any one or all of Annexes III, IV and V (hereinafter referred to as ‘Optional Annexes’) of the present Convention. Subject to the above, Parties to the Convention shall be bound by any Annex in its entirety.

(2) A State which has declared that it is not bound by an Optional Annex may at any time accept such Annex by depositing with the Organization an instrument of the kind referred to in Article 13(2).

(3) A State which makes a declaration under paragraph (1) of the present Article in respect of an Optional Annex and which has not subsequently accepted that Annex in accordance with paragraph (2) of the present Article shall not be under any obligation nor entitled to claim any privileges under the present Convention in respect of matters related to such Annex and all references to Parties in the present Convention shall not include that State in so far as matters related to such Annex are concerned.

(4) The Organization shall inform the States which have signed or acceded to the present Convention of any declaration under the present Article as well as the receipt of any instrument deposited in accordance with the provisions of paragraph (2) of the present Article.

(1) The present Convention shall enter into force twelve months after the date on which less than 15 States, the combined merchant fleets of which constitute not less than fifty per cent of the gross tonnage of the world's merchant shipping, have become parties to it in accordance with Article 13. (2) An Optional Annex shall enter into force twelve months after the date on which the conditions stipulated in paragraph (1) of the present Article have been satisfied in relation to that Annex.

(3) The Organization shall inform the States which have signed the present Convention or acceded to it of the date on which it enters into force and of the date on which an Optional Annex enters into force in accordance with paragraph (2) of the present Article.

(4) For States which have deposited an instrument of ratification, acceptance, approval or accession in respect of the present Convention or any Optional Annex after the requirements for entry into force thereof have been met but prior to the date of entry into force, the ratification, acceptance, approval or accession shall take effect on the date of entry into force of the Convention or such Annex or three months after the date of deposit of the instrument whichever is the later date.

(5) For States which have deposited an instrument of ratification, acceptance, approval or accession after the date on which the Convention or an Optional Annex entered into force, the Convention or the Optional Annex shall become effective three months after the date of deposit of the instrument.

(6) After the date on which all the conditions required under Article 16 to bring an amendment to the present Convention or an Optional Annex into force have been fulfilled, any instrument of ratification, acceptance, approval or accession deposited shall apply to the Convention or Annex as amended.

(1) The present Convention may be amended by any of the procedures specified in the following paragraphs.

(a) any amendment proposed by a Party to the Convention shall be submitted to the Organization and circulated by its Secretary-General to all Members of the Organization and all Parties at least six months prior to its consideration;

(b) any amendment proposed and circulated as above shall be submitted to an appropriate body by the Organization for consideration;

(c) Parties to the Convention, whether or not Members of the Organization, shall be entitled to participate in the proceedings of the appropriate body;

(d) amendments shall be adopted by a two-thirds majority of only the Parties to the Convention present and voting;

(e) if adopted in accordance with sub-paragraph (d) above, amendments shall be communicated by the Secretary-General of the Organization to all the Parties to the Convention for acceptance;

(f) an amendment shall be deemed to have been accepted in the following circumstances:

(i) an amendment to an Article of the Convention shall be deemed to have been accepted on the date on which it is accepted by two-thirds of the Parties, the combined merchant fleets of which constitute not less than fifty per cent of the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be deemed to have been accepted in accordance with the procedure specified in sub-paragraph (f)(iii) unless the appropriate body, at the time of its adoption, determines that the amendment shall be deemed to have been accepted on the date on which it is accepted by two-thirds of the Parties, the combined merchant fleets of which constitute not less than fifty per cent of the gross tonnage of the world's merchant fleet. Nevertheless, at any time before the entry into force of an amendment to an Annex to the Convention, a Party may notify the Secretary-General of the Organization that its express approval will be necessary before the amendment enters into force for it. The latter shall bring such notification and the date of its receipt to the notice of Parties;

(iii) an amendment to an Appendix to an Annex to the Convention shall be deemed to have been accepted at the end of a period to be determined by the appropriate body at the time of its adoption, which period shall be not less than ten months, unless within that period an objection is communicated to the Organization by not less than one-third of the Parties or by the Parties the combined merchant fleets of which constitute not less than fifty per cent of the gross tonnage of the world's merchant fleet whichever condition is fulfilled;

(iv) an amendment to Protocol I to the Convention shall be subject to the same procedures as for the amendments to the Annexes to the Convention, as provided for in sub-paragraphs (f)(ii) or (f)(iii) above;

(v) an amendment to Protocol II to the Convention shall be subject to the same procedures as for the amendments to an Article of the Convention, as provided for in sub-paragraph (f)(i) above;

(i) in the case of an amendment to an Article of the Convention, to Protocol II, or to Protocol I or to an Annex to the Convention not under the procedure specified in sub-paragraph (f)(iii), the amendment accepted in conformity with the foregoing provisions shall enter into force six months after the date of its acceptance with respect to the Parties which have declared that they have accepted it;

(ii) in the case of an amendment to Protocol I, to an Appendix to an Annex or to an Annex to the Convention under the procedure specified in sub-paragraph (f)(iii), the amendment deemed to have been accepted in accordance with the foregoing conditions shall enter into force six months after its acceptance for all the Parties with the exception of those which, before that date, have made a declaration that they do not accept it or a declaration under sub-paragraph (f)(ii), that their express approval is necessary.

(a) Upon the request of a Party, concurred in by at least one-third of the Parties, the Organization shall convene a Conference of Parties to the Convention to consider amendments to the present Convention.

(b) Every amendment adopted by such a Conference by a two-thirds majority of those present and voting of the Parties shall be communicated by the Secretary-General of the Organization to all Contracting Parties for their acceptance.

(c) Unless the Conference decides otherwise, the amendment shall be deemed to have been accepted and to have entered into force in accordance with the procedures specified for that purpose in paragraph (2)(f) and (g) above.

(4) (a) In the case of an amendment to an Optional Annex, a reference in the present Article to a ‘Party to the Convention’ shall be deemed to mean a reference to a Party bound by that Annex.

(b) Any Party which has declined to accept an amendment to an Annex shall be treated as a non-Party only for the purpose of application of that Amendment.

(5) The adoption and entry into force of a new Annex shall be subject to the same procedures as for the adoption and entry into force of an amendment to an Article of the Convention.

(6) Unless expressly provided otherwise, any amendment to the present Convention made under this Article, which relates to the structure of a ship, shall apply only to ships for which the building contract is placed, or in the absence of a building contract, the keel of which is laid, on or after the date on which the amendment comes into force.

(7) Any amendment to a Protocol or to an Annex shall relate to the substance of that Protocol or Annex and shall be consistent with the Articles of the present Convention.

(8) The Secretary-General of the Organization shall inform all Parties of any amendments which enter into force under the present Article, together with the date on which each such amendment enters into force.

(9) Any declaration of acceptance or of objection to an amendment under the present Article shall be notified in writing to the Secretary-General of the Organization. The latter shall bring such notification and the date of its receipt to the notice of the Parties to the Convention.

The Parties to the Convention shall promote, in consultation with the Organization and other international bodies, with assistance and co-ordination by the Executive Director of the United Nations Environment Programme, support for those Parties which request technical assistance for:

(b) the supply of necessary equipment and facilities for reception and monitoring;

(c) the facilitation of other measures and arrangements to prevent or mitigate pollution of the marine environment by ships; and

preferably within the countries concerned, so furthering the aims and purposes of the present Convention.

(1) The present Convention or any Optional Annex may be denounced by any Parties to the Convention at any time after the expiry of five years from the date on which the Convention or such Annex enters into force for that Party.

(2) Denunciation shall be effected by notification in writing to the Secretary-General of the Organization who shall inform all the other Parties of any such notification received and of the date of its receipt as well as the date on which such denunciation takes effect.

(3) A denunciation shall take effect twelve months after receipt of the notification of denunciation by the Secretary-General of the Organization or after the expiry of any other longer period which may be indicated in the notification.

(1) The present Convention shall be deposited with the Secretary-General of the Organization who shall transmit certified true copies thereof to all States which have signed the present Convention or acceded to it.

(2) As soon as the present Convention enters into force, the text shall be transmitted by the Secretary-General of the Organization to the Secretary-General of the United Nations for registration and publication, in accordance with Article 102 of the Charter of the United Nations.

The present Convention is established in a single copy in the English, French, Russian and Spanish languages, each text being equally authentic. Official translations in the Arabic, German, Italian and Japanese languages shall be prepared and deposited with the signed original.

IN WITNESS WHEREOF the undersigned being duly authorized by their respective Governments for that purpose have signed the present Convention.

DONE AT LONDON this second day of November, one thousand nine hundred and seventy-three.

PROTOCOL I PROVISIONS CONCERNING REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES (in accordance with Article 8 of the Convention)

(1) The Master of a ship involved in an incident referred to in Article III of this Protocol, or other person having charge of the ship, shall report the particulars of such incident without delay and to the fullest extent possible in accordance with the provisions of this Protocol.

(2) In the event of the ship referred to in paragraph (1) of the present Article being abandoned, or in the event of a report from such ship being incomplete or unobtainable, the owner, charterer, manager or operator of the ship, or their agent shall, to the fullest extent possible assume the obligations placed upon the Master under the provisions of this Protocol.

(1) Each report shall be made by radio whenever possible, but in any case by the fastest channels available at the time the report is made. Reports made by radio shall be given the highest possible priority.

(2) Reports shall be directed to the appropriate officer or agency specified in paragraph (2)(a) of Article 8 of the Convention.

(b) a discharge permitted under the present Convention by virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or saving life at sea; or

(c) a discharge of a harmful substance for the purpose of combating a specific pollution incident or for purposes of legitimate scientific research into pollution abatement or control; or

(d) the probability of a discharge referred to in sub-paragraphs (a), (b) or (c) of this Article.

(a) a clear indication or description of the harmful substances involved, including, if possible, the correct technical names of such substances (trade names should not be used in place of the correct technical names);

(b) a statement or estimate of the quantities, concentrations and likely conditions of harmful substances discharged or likely to be discharged into the sea;

(3) Each report shall clearly indicate whether the harmful substance discharged, or likely to be discharged is oil, a noxious liquid substance, a noxious solid substance or a noxious gaseous substance and whether such substance was or is carried in bulk or contained in packaged form, freight containers, portable tanks, or road and rail tank wagons.

(4) Each report shall be supplemented as necessary by any other relevant information requested by a recipient of the report or which the person sending the report deems appropriate.

Any person who is obliged under the provisions of this Protocol to send a report shall, when possible:

(a) supplement the initial report, as necessary, with information concerning further developments; and

(b) comply as fully as possible with requests from affected States for additional information concerning the incident.

Arbitration procedure, unless the Parties to the dispute decide otherwise, shall be in accordance with the rules set out in this Protocol.

(1) An Arbitration Tribunal shall be established upon the request of one Party to the Convention addressed to another in application of Article 10 of the present Convention. The request for arbitration shall consist of a statement of the case together with any supporting documents.

(2) The requesting Party shall inform the Secretary-General of the Organization of the fact that it has applied for the establishment of a Tribunal, of the names of the Parties to the dispute, and of the Articles of the Convention or Regulations over which there is in its opinion disagreement concerning their interpretation or application. The Secretary-General shall transmit this information to all Parties.

The Tribunal shall consist of three members: one Arbitrator nominated by each Party to the dispute and a third Arbitrator who shall be nominated by agreement between the two first named, and shall act as its Chairman.

(1) If, at the end of a period of sixty days from the nomination of the second Arbitrator, the Chairman of the Tribunal shall not have been nominated, the Secretary-General of the Organization upon request of either Party shall within a further period of sixty days proceed to such nomination, selecting him from a list of qualified persons previously drawn up by the Council of the Organization.

(2) If, within a period of sixty days from the date of the receipt of the request, one of the Parties shall not have nominated the member of the Tribunal for whose designation it is responsible, the other Party may directly inform the Secretary-General of the Organization who shall nominate the Chairman of the Tribunal within a period of sixty days, selecting him from the list prescribed in paragraph (1) of the present Article.

(3) The Chairman of the Tribunal shall, upon nomination, request the party which has not provided an Arbitrator, to do so in the same manner and under the same conditions. If the Party does not make the required nomination, the Chairman of the Tribunal shall request the Secretary-General of the Organization to make the nomination in the form and conditions prescribed in the preceding paragraph.

(4) The Chairman of the Tribunal, if nominated under the provisions of the present Article, shall not be or have been a national of one of the Parties concerned, except with the consent of the other Party.

(5) In the case of the decease or default of an Arbitrator for whose nomination one of the Parties is responsible, the said Party shall nominate a replacement within a period of sixty days from the date of decease or default. Should the said Party not make the nomination, the arbitration shall proceed under the remaining Arbitrators. In case of the decease or default of the Chairman of the Tribunal, a replacement shall be nominated in accordance with the provisions of Article III above, or in the absence of agreement between the members of the Tribunal within a period of sixty days of the decease or default, according to the provisions of the present Article.

The Tribunal may hear and determine counter-claims arising directly out of the subject matter of the dispute.

Each Party shall be responsible for the remuneration of its Arbitrator and connected costs and for the costs entailed by the preparation of its own case. The remuneration of the Chairman of the Tribunal and of all general expenses incurred by the Arbitration shall be borne equally by the Parties. The Tribunal shall keep a record of all its expenses and shall furnish a final statement thereof.

Any Party to the Convention which has an interest of a legal nature and which may be affected by the decision in the case may, after giving written notice to the Parties which have originally initiated the procedure, join in the arbitration procedure with the consent of the Tribunal.

Any Arbitration Tribunal established under the provisions of the present Protocol shall decide its own rules of procedure.

(1) Decisions of the Tribunal both as to its procedure and its place of meeting and as to any question laid before it, shall be taken by majority votes of its members; the absence or abstention of one of the members of the Tribunal for whose nomination the Parties were responsible, shall not constitute an impediment to the Tribunal reaching a decision. In cases of equal voting, the vote of the Chairman shall be decisive.

(2) The Parties shall facilitate the work of the Tribunal and in particular, in accordance with their legislation, and using all means at their disposal:

(b) enable the Tribunal to enter their territory, to hear witnesses or experts, and to visit the scene.

(3) Absence or default of one Party shall not constitute an impediment to the procedure.

(1) The Tribunal shall render its award within a period of five months from the time it is established unless it decides, in the case of necessity, to extend the time limit for a further period not exceeding three months. The award of the Tribunal shall be accompanied by a statement of reasons. It shall be final and without appeal and shall be communicated to the Secretary-General of the Organization. The Parties shall immediately comply with the award.

(2) Any controversy which may arise between the Parties as regards interpretation or execution of the award may be submitted by either Party for judgment to the Tribunal which made the award, or, if it is not available to another Tribunal constituted for this purpose, in the same manner as the original Tribunal.

(1) ‘Oil’ means petroleum in any form including crude oil, fuel oil, sludge, oil refuse and refined products (other than petrochemicals which are subject to the provisions of Annex II of the present Convention) and, without limiting the generality of the foregoing, includes the substances listed in Appendix I to this Annex.

(3) ‘Oil fuel’ means any oil used as fuel in connexion with the propulsion and auxiliary machinery of the ship in which such oil is carried.

(4) ‘Oil tanker’ means a ship constructed or adapted primarily to carry oil in bulk in its cargo spaces and includes combination carriers and any ‘chemical tanker’ as defined in Annex II of the present Convention when it is carrying a cargo or part cargo of oil in bulk.

(5) ‘Combination carrier’ means a ship designed to carry either oil or solid cargoes in bulk.

(b) in the absence of a building contract, the keel of which is laid or which is at a similar stage of construction after 30 June 1976; or

(ii) in the absence of a contract, the construction work of which is begun after 30 June 1976; or

(iii) which is completed after 31 December 1979. (7) ‘Existing ship’ means a ship which is not a new ship.

(a) which substantially alters the dimensions or carrying capacity of the ship; or

(d) which otherwise so alters the ship that if it were a new ship, it would become subject to relevant provisions of the present Convention not applicable to it as an existing ship.

(9) ‘Nearest land’. The term ‘from the nearest land’ means from the baseline from which the territorial sea of the territory in question is established in accordance with international law, except that, for the purposes of the present Convention ‘from the nearest land’ off the north eastern coast of Australia shall mean from a line drawn from a point on the coast of Australia in

latitude 11°00° South, longitude 142°08° East to a point in latitude 10°35° South,

longitude 141°55° East - thence to a point latitude 10°00° South, longitude 142°00° East, thence to a point latitude 9°10° South, longitude 143°52° East, thence to a point latitude 9°00° South, longitude 144°30° East, thence to a point latitude 13°00° South,

longitude 153°00° East, thence to a point on the coast of Australia in latitude 24°42° South, longitude 153°15° East.

(10) ‘Special area’ means a sea area where for recognized technical reasons in relation to its oceanographical and ecological condition and to the particular character of its traffic the adoption of special mandatory methods for the prevention of sea pollution by oil is required. Special areas shall include those listed in Regulation 10 of this Annex.

(11) ‘Instantaneous rate of discharge of oil content’ means the rate of discharge of oil in litres per hour at any instant divided by the speed of the ship in knots at the same instant.

(12) ‘Tank’ means an enclosed space which is formed by the permanent structure of a ship and which is designed for the carriage of liquid in bulk.

(15) ‘Slop tank’ means a tank specifically designated for the collection of tank drainings, tank washings and other oily mixtures.

(16) ‘Clean ballast’ means the ballast in a tank which since oil was last carried therein, has been so cleaned that effluent therefrom if it were discharged from a ship which is stationary into clean calm water on a clear day would not produce visible traces of oil on the surface of the water or on adjoining shorelines or cause a sludge or emulsion to be deposited beneath the surface of the water or upon adjoining shorelines. If the ballast is discharged through an oil discharge monitoring and control system approved by the Administration, evidence based on such a system to the effect that the oil content of the effluent did not exceed 15 parts per million shall be determinative that the ballast was clean, notwithstanding the presence of visible traces.

(17) ‘Segregated ballast’ means the ballast water introduced into a tank which is completely separated from the cargo oil and oil fuel system and which is permanently allocated to the carriage of ballast or to the carriage of ballast or cargoes other than oil or noxious substances as variously defined in the Annexes of the present Convention.

(18) ‘Length’ (L) means 96 per cent of the total length on a waterline at 85 per cent of the least moulded depth measured from the top of the keel, or the length from the foreside of the stem to the axis of the rudder stock on that waterline, if that be greater. In ships designed with a rake of keel the waterline on which this length is measured shall be parallel to the designed waterline. The length (L) shall be measured in metres.

(19) ‘Forward and after perpendiculars’ shall be taken at the forward and after ends of the length (L). The forward perpendicular shall coincide with the foreside of the stem on the waterline on which the length is measured.

(21) ‘Breadth’ (B) means the maximum breadth of the ship, measured amidships to the moulded line of the frame in a ship with a metal shell and to the outer surface of the hull in a ship with a shell of any other material. The breadth (B) shall be measured in metres.

(22) ‘Deadweight’ (DW) means the difference in metric tons between the displacement of a ship in water of a specific gravity of 1.025 at the load waterline corresponding to the assigned summer freeboard and the lightweight of the ship.

(23) ‘Lightweight’ means the displacement of a ship in metric tons without cargo, oil fuel, lubricating oil, ballast water, fresh water and feedwater in tanks, consumable stores, passengers and their effects.

(24) ‘Permeability’ of a space means the ratio of the volume within that space which is assumed to be occupied by water to the total volume of that space.

(25) ‘Volumes’ and ‘areas’ in a ship shall be calculated in all cases to moulded lines.

(1) Unless expressly provided otherwise, the provisions of this Annex shall apply to all ships.

(2) In ships other than oil tankers fitted with cargo spaces which are constructed and utilized to carry oil in bulk of an aggregate capacity of 200 cubic metres or more, the requirements of Regulations 9, 10, 14, 15(1), (2) and (3), 18, 20 and 24(4) of this Annex for oil tankers shall also apply to the construction and operation of those spaces, except that where such aggregate capacity is less than 1,000 cubic metres the requirements of Regulation 15(4) of this Annex may apply in lieu of Regulation 15(1), (2) and (3).

(3) Where a cargo subject to the provisions of Annex II of the present Convention is carried in a cargo space of an oil tanker, the appropriate requirements of Annex II of the present Convention shall also apply.

(4) (a) Any hydrofoil, air-cushion vehicle and other new type of vessel (near-surface craft, submarine craft, etc.) whose constructional features are such as to render the application of any of the provisions of Chapters II and III of this Annex relating to construction and equipment unreasonable or impracticable may be exempted by the Administration from such provisions, provided that the construction and equipment of that ship provides equivalent protection against pollution by oil, having regard to the service for which it is intended.

(b) Particulars of any such exemption granted by the Administration shall be indicated in the Certificate referred to in Regulation 5 of this Annex.

(c) The Administration which allows any such exemption shall, as soon as possible, but not more than ninety days thereafter, communicate to the Organization particulars of same and the reasons therefor, which the Organization shall circulate to the Parties to the Convention for their information and appropriate action, if any.

(1) The Administration may allow any fitting, material, appliance or apparatus to be fitted in a ship as an alternative to that required by this Annex if such fitting, material, appliance or apparatus is at least as effective as that required by this Annex. This authority of the Administration shall not extend to substitution of operational methods to effect the control of discharge of oil as equivalent to those design and construction features which are prescribed by Regulations in this Annex.

(2) The Administration which allows a fitting, material, appliance or apparatus, as an alternative to that required by this Annex shall communicate to the Organization for circulation to the Parties to the Convention particulars thereof, for their information and appropriate action, if any.

(1) Every oil tanker of 150 tons gross tonnage and above, and every other ship of 400 tons gross tonnage and above shall be subject to the surveys specified below:

(a) An initial survey before the ship is put in service or before the Certificate required under Regulation 5 of this Annex is issued for the first time, which shall include a complete survey of its structure, equipment, fittings, arrangements and material in so far as the ship is covered by this Annex. This survey shall be such as to ensure that the structure, equipment, fittings, arrangements and material fully comply with the applicable requirements of this Annex.

(b) Periodical surveys at intervals specified by the Administration, but not exceeding five years, which shall be such as to ensure that the structure, equipment, fittings, arrangements and material fully comply with the applicable requirements of this Annex. However, where the duration of the International Oil Pollution Prevention Certificate (1973) is extended as specified in Regulation 8(3) or (4) of this Annex, the interval of the periodical survey may be extended correspondingly.

(c) Intermediate surveys at intervals specified by the Administration but not exceeding thirty months, which shall be such as to ensure that the equipment and associated pump and piping systems, including oil discharge monitoring and control systems, oily-water separating equipment and oil filtering systems, fully comply with the applicable requirements of this Annex and are in good working order. Such intermediate surveys shall be endorsed on the International Oil Pollution Prevention Certificate (1973) issued under Regulation 5 of this Annex.

(2) The Administration shall establish appropriate measures for ships which are not subject to the provisions of paragraph (1) of this Regulation in order to ensure that the applicable provisions of this Annex are complied with.

(3) Surveys of the ship as regards enforcement of the provisions of this Annex shall be carried out by officers of the Administration. The Administration may, however, entrust the surveys either to surveyors nominated for the purpose or to organizations recognized by it. In every case the Administration concerned fully guarantees the completeness and efficiency of the surveys.

(4) After any survey of the ship under this Regulation has been completed, no significant change shall be made in the structure, equipment, fittings, arrangements or material covered by the survey without the sanction of the Administration, except the direct replacement of such equipment or fittings.

(1) An International Oil Pollution Prevention Certificate (1973) shall be issued, after survey in accordance with the provisions of Regulation 4 of this Annex, to any oil tanker of 150 tons gross tonnage and above and any other ships of 400 tons gross tonnage and above which are engaged in voyages to ports or off-shore terminals under the jurisdiction of other Parties to the Convention. In the case of existing ships this requirement shall apply twelve months after the date of entry into force of the present Convention.

(2) Such Certificate shall be issued either by the Administration or by any persons or organization duly authorized by it. In every case the Administration assumes full responsibility for the Certificate.

(1) The Government of a Party to the Convention may, at the request of the Administration, cause a ship to be surveyed and, if satisfied that the provisions of this Annex are complied with, shall issue or authorize the issue of an International Oil Pollution Prevention Certificate (1973) to the ship in accordance with this Annex.

(2) A copy of the Certificate and a copy of the survey report shall be transmitted as soon as possible to the requesting Administration.

(3) A Certificate so issued shall contain a statement to the effect that it has been issued at the request of the Administration and it shall have the same force and receive the same recognition as the Certificate issued under Regulation 5 of this Annex.

(4) No International Oil Pollution Prevention Certificate (1973) shall be issued to a ship which is entitled to fly the flag of a State which is not a Party.

The International Oil Pollution Prevention Certificate (1973) shall be drawn up in an official language of the issuing country in the form corresponding to the model given in Appendix II to this Annex. If the language used is neither English nor French, the text shall include a translation into one of these languages.

(1) An International Oil Pollution Prevention Certificate (1973) shall be issued for a period specified by the Administration, which shall not exceed five years from the date of issue, except as provided in paragraphs (2), (3) and (4) of this Regulation.

(2) If a ship at the time when the Certificate expires is not in a port or off-shore terminal under the jurisdiction of the Party to the Convention whose flag the ship is entitled to fly, the Certificate may be extended by the Administration, but such extension shall be granted only for the purpose of allowing the ship to complete its voyage to the State whose flag the ship is entitled to fly or in which it is to be surveyed and then only in cases where it appears proper and reasonable to do so.

(3) No Certificate shall be thus extended for a period longer than five months and a ship to which such extension is granted shall not on its arrival in the State whose flag it is entitled to fly or the port in which it is to be surveyed, be entitled by virtue of such extension to leave that port or State without having obtained a new Certificate.

(4) A Certificate which has not been extended under the provisions of paragraph (2) of this Regulation may be extended by the Administration for a period of grace of up to one month from the date of expiry stated on it.

(5) A Certificate shall cease to be valid if significant alterations have taken place in the construction, equipment, fittings, arrangements, or material required without the sanction of the Administration, except the direct replacement of such equipment or fittings, or if intermediate surveys as specified by the Administration under Regulation 4(1)(c) of this Annex are not carried out.

(6) A Certificate issued to a ship shall cease to be valid upon transfer of such a ship to the flag of another State, except as provided in paragraph (7) of this Regulation.

(7) Upon transfer of a ship to the flag of another Party, the Certificate shall remain in force for a period not exceeding five months provided that it would not have expired before the end of that period, or until the Administration issues a replacement Certificate, whichever is earlier. As soon as possible after the transfer has taken place the Government of the Party whose flag the ship was formerly entitled to fly shall transmit to the Administration a copy of the Certificate carried by the ship before the transfer and, if available, a copy of the relevant survey report.

(1) Subject to the provisions of Regulations 10 and 11 of this Annex and paragraph (2) of this Regulation, any discharge into the sea of oil or oily mixtures from ships to which this Annex applies shall be prohibited except when all the following conditions are satisfied:

(a) for an oil tanker, except as provided for in sub-paragraph (b) of this paragraph:

(iv) the instantaneous rate of discharge of oil content does not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does not exceed for existing tankers 1/15,000 of the total quantity of the particular cargo of which the residue formed a part, and for new tankers 1/30,000 of the total quantity of the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in Regulation 15(3) of this Annex, an oil discharge monitoring and control system and a slop tank arrangement as required by Regulation 15 of this Annex;

(b) from a ship of 400 tons gross tonnage and above other than an oil tanker and from machinery space bilges excluding cargo pump room bilges of an oil tanker unless mixed with oil cargo residue:

(v) the ship has in operation an oil discharge monitoring and control system, oily-water separating equipment, oil filtering system or other installation as required by Regulation 16 of the Annex.

(2) In the case of a ship of less than 400 tons gross tonnage other than an oil tanker whilst outside the special area, the Administration shall ensure that it is equipped as far as practicable and reasonable with installations to ensure the storage of oil residues on board and their discharge to reception facilities or into the sea in compliance with the requirements of paragraph (1)(b) of this Regulation.

(3) Whenever visible traces of oil are observed on or below the surface of the water in the immediate vicinity of a ship or its wake, Governments of Parties to the Convention should, to the extent they are reasonably able to do so, promptly investigate the facts bearing on the issue of whether there has been a violation of the provisions of this Regulation or Regulation 10 of this Annex. The investigation should include, in particular, the wind and sea conditions, the track and speed of the ship, other possible sources of the visible traces in the vicinity, and any relevant oil discharge records.

(4) The provisions of paragraph (1) of this Regulation shall not apply to the discharge of clean or segregated ballast. The provisions of sub-paragraph (1)(b) of this Regulation shall not apply to the discharge of oily mixture which without dilution has an oil content not exceeding 15 parts per million.

(5) No discharge into the sea shall contain chemicals or other substances in quantities or concentrations which are hazardous to the marine environment or chemicals or other substances introduced for the purpose of circumventing the conditions of discharge specified in this Regulation.

(6) The oil residues which cannot be discharged into the sea in compliance with paragraphs (1), (2) and (4) of this Regulation shall be retained on board or discharged to reception facilities.

Regulation 10 Methods for the Prevention of Oil Pollution from Ships while operating in Special Areas

(1) For the purposes of this Annex the special areas are the Mediterranean Sea area, the Baltic Sea area, the Black Sea area, the Red Sea area and the ‘Gulfs area’ which are defined as follows:

(a) The Mediterranean Sea area means the Mediterranean Sea proper including the gulfs and seas therein with the boundary between the Mediterranean and the Black Sea constituted by the 41°N parallel and bounded to the west by the Straits of Gibraltar at the meridian of 5°36°W. (b) The Baltic Sea area means the Baltic Sea proper with the Gulf of Bothnia, the Gulf of Finland and the entrance to the Baltic Sea bounded by the parallel of the Skaw in the Skagerrak at 57°44.8°N. (c) The Black Sea area means the Black Sea proper with the boundary between the Mediterranean and the Black Sea constituted by the parallel 41°N. (d) The Red Sea area means the Red Sea proper including the Gulfs of Suez and Aqaba bounded at the south by the rhumb line between Ras si Ane (12°8.5°N, 43°19.6°E) and Husn Murad (12°40.4°N, 43°30.2°E).

(e) The Gulfs area means the sea area located north west of the rhumb line between Ras al Hadd (22°30°N, 59°48°E) and Ras Al Fasteh (25°04°N, 61°25°E).

(2) (a) Subject to the provisions of Regulation 11 of this Annex, any discharge into the sea of oil or oily mixture from any oil tanker and any ship of 400 tons gross tonnage and above other than an oil tanker shall be prohibited, while in a special area.

(b) Such ships while in a special area shall retain on board all oil drainage and sludge, dirty ballast and tank washing waters and discharge them only to reception facilities.

(3) (a) Subject to the provisions of Regulation 11 of this Annex, any discharge into the sea of oil or oily mixture from a ship of less than 400 tons gross tonnage, other than an oil tanker, shall be prohibited while in a special area, except when the oil content of the effluent without dilution does not exceed 15 parts per million or alternatively when all of the following conditions are satisfied:

(iii) the discharge is made as far as practicable from the land, but in no case less than 12 nautical miles from the nearest land.

(b) No discharge into the sea shall contain chemicals or other substances in quantities or concentrations which are hazardous to the marine environment or chemicals or other substances introduced for the purpose of circumventing the conditions of discharge specified in this Regulation.

(c) The oil residues which cannot be discharged into the sea in compliance with sub-paragraph (a) of this paragraph shall be retained on board or discharged to reception facilities.

(4) The provisions of this Regulation shall not apply to the discharge of clean or segregated ballast.

(5) Nothing in this Regulation shall prohibit a ship on a voyage only part of which is in a special area from discharging outside the special area in accordance with Regulation 9 of this Annex.

(6) Whenever visible traces of oil are observed on or below the surface of the water in the immediate vicinity of a ship or its wake, the Governments of Parties to the Convention should, to the extent they are reasonably able to do so, promptly investigate the facts bearing on the issue of whether there has been a violation of the provisions of this Regulation or Regulation 9 of this Annex. The investigation should include, in particular, the wind and sea conditions, the track and speed of the ship, other possible sources of the visible traces in the vicinity, and any relevant oil discharge records.

(i) The Government of each Party to the Convention, the coastline of which borders on any given special area undertakes to ensure that not later than 1 January 1977 all oil loading terminals and repair ports within the special area are provided with facilities adequate for the reception and treatment of all the dirty ballast and tank washing water from oil tankers. In addition all ports within the special area shall be provided with adequate reception facilities for other residues and oily mixtures from all ships. Such facilities shall have adequate capacity to meet the needs of the ships using them without causing undue delay.

(ii) The Government of each Party having under its jurisdiction entrances to seawater courses with low depth contour which might require a reduction of draught by the discharge of ballast undertakes to ensure the provision of the facilities referred to in sub-paragraph (a)(i) of this paragraph but with the proviso that ships required to discharge slops or dirty ballast could be subject to some delay.

(iii) During the period between the entry into force of the present Convention (if earlier than 1 January 1977) and 1 January 1977 ships while navigating in the special areas shall comply with the requirements of Regulation 9 of this Annex. However, the Governments of Parties the coastlines of which border any of the special areas under this sub-paragraph may establish a date earlier than 1 January 1977, but after the date of entry into force of the present Convention, from which the requirements of this Regulation in respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been provided by the date so established; and

(2) provided that the Parties concerned notify the Organization of the date so established at least six months in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in accordance with sub-paragraph (a)(iii) of this paragraph if earlier, each Party shall notify the Organization for transmission to the Contracting Governments concerned of all cases where the facilities are alleged to be inadequate.

(i) The Government of each Party the coastline of which borders on the special areas undertakes to ensure that as soon as possible all oil loading terminals and repair ports within these special areas are provided with facilities adequate for the reception and treatment of all the dirty ballast and tank washing water from tankers In addition all ports within the special area shall be provided with adequate reception facilities for other residues and oily mixtures from all ships. Such facilities shall have adequate capacity to meet the needs of the ships using them without causing undue delay.

(ii) The Government of each Party having under its jurisdiction entrances to seawater courses with low depth contour which might require a reduction of draught by the discharge of ballast shall undertake to ensure the provision of the facilities referred to in sub-paragraph (b)(i) of this paragraph but with the proviso that ships required to discharge slops or dirty ballast could be subject to some delay.

(iii) Each Party concerned shall notify the Organization of the measures taken pursuant to provisions of sub-paragraph (b)(i) and (ii) of this paragraph. Upon receipt of sufficient notifications the Organization shall establish a date from which the requirements of this Regulation in respect of the area in question shall take effect. The Organization shall notify all Parties of the date so established no less than twelve months in advance of that date.

(iv) During the period between the entry into force of the present Convention and the date so established, ships while navigating in the special area shall comply with the requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these special areas where such facilities are not yet available shall also fully comply with the requirements of this Regulation. However, oil tankers entering these special areas for the purpose of loading shall make every effort to enter the area with only clean ballast on board.

(vi) After the date on which the requirements for the special area in question take effect, each Party shall notify the Organization for transmission to the Parties concerned of all cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in Regulation 12 of this Annex shall be provided by 1 January 1977 or one year after the date of entry into force of the present Convention, whichever occurs later.

(a) the discharge into the sea of oil or oily mixture necessary for the purpose of securing the safety of a ship or saving life at sea; or

(b) the discharge into the sea of oil or oily mixture resulting from damage to a ship or its equipment:

(i) provided that all reasonable precautions have been taken after the occurrence of the damage or discovery of the discharge for the purpose of preventing or minimizing the discharge; and

(ii) except if the owner or the Master acted either with intent to cause damage, or recklessly and with knowledge that damage would probably result; or

(c) the discharge into the sea of substances containing oil, approved by the Administration, when being used for the purpose of combating specific pollution incidents in order to minimize the damage from pollution. Any such discharge shall be subject to the approval of any Government in whose jurisdiction it is contemplated the discharge will occur.

(1) Subject to the provisions of Regulation 10 of this Annex, the Government of each Party undertakes to ensure the provision at oil loading terminals, repair ports, and in other ports in which ships have oily residues to discharge, of facilities for the reception of such residues and oily mixtures as remain from oil tankers and other ships adequate to meet the needs of the ships using them without causing undue delay to ships.

(2) Reception facilities in accordance with paragraph (1) of this Regulation shall be provided in:

(a) all ports and terminals in which crude oil is loaded into oil tankers where such tankers have immediately prior to arrival completed a ballast voyage of not more than 72 hours or not more than 1,200 nautical miles;

(b) all ports and terminals in which oil other than crude oil in bulk is loaded at an average quantity of more than 1,000 metric tons per day;

(d) all ports and terminals which handle ships provided with the sludge tank(s) required by Regulation 17 of this Annex;

(e) all ports in respect of oily bilge waters and other residues, which cannot be discharged in accordance with Regulation 9 of this Annex; and

(f) all loading ports for bulk cargoes in respect of oil residues from combination carriers which cannot be discharged in accordance with Regulation 9 of this Annex.

(a) Crude oil loading terminals shall have sufficient reception facilities to receive oil and oily mixtures which cannot be discharged in accordance with the provisions of Regulation 9(1)(a) of this Annex from all oil tankers on voyages as described in paragraph (2)(a) of this Regulation.

(b) Loading ports and terminals referred to in paragraph (2)(b) of this Regulation shall have sufficient reception facilities to receive oil and oily mixtures which cannot be discharged in accordance with the provisions of Regulation 9(1)(a) of this Annex from oil tankers which load oil other than crude oil in bulk.

(c) All ports having ship repair yards or tank cleaning facilities shall have sufficient reception facilities to receive all residues and oily mixtures which remain on board for disposal from ships prior to entering such yards or facilities.

(d) All facilities provided in ports and terminals under paragraph (2)(d) of this Regulation shall be sufficient to receive all residues retained according to Regulation 17 of this Annex from all ships that may reasonably be expected to call at such ports and terminals.

(e) All facilities provided in ports and terminals under this Regulation shall be sufficient to receive oily bilge waters and other residues which cannot be discharged in accordance with Regulation 9 of this Annex.

(f) The facilities provided in loading ports for bulk cargoes shall take into account the special problems of combination carriers as appropriate.

(4) The reception facilities prescribed in paragraphs (2) and (3) of this Regulation shall be made available no later than one year from the date of entry into force of the present Convention or by 1 January 1977, whichever occurs later.

(5) Each Party shall notify the Organization for transmission to the Parties concerned of all cases where the facilities provided under this Regulation are alleged to be inadequate.

(1) Every new oil tanker of 70,000 tons deadweight and above shall be provided with segregated ballast tanks and shall comply with the requirements of this Regulation.

(2) The capacity of the segregated ballast tanks shall be so determined that the ship may operate safely on ballast voyages without recourse to the use of oil tanks for water ballast except as provided for in paragraph (3) of this Regulation. In all cases, however, the capacity of segregated ballast tanks shall be at least such that in any ballast condition at any part of the voyage, including the conditions consisting of lightweight plus segregated ballast only, the ship's draughts and trim can meet each of the following requirements:

(a) the moulded draught amidships (dm) in metres (without taking into account any ship's deformation) shall not be less than:

(b) the draughts at the forward and after perpendiculars shall correspond to those determined by the draught amidships (dm), as specified in subparagraph (a) of this paragraph, in association with the trim by the stern of not greater than 0.015L; and

(c) in any case the draught at the after perpendicular shall not be less than that which is necessary to obtain full immersion of the propeller(s).

(3) In no case shall ballast water be carried in oil tanks except in weather conditions so severe that, in the opinion of the Master, it is necessary to carry additional ballast water in oil tanks for the safety of the ship. Such additional ballast water shall be processed and discharged in compliance with Regulation 9 and in accordance with the requirements of Regulation 15 of this Annex, and entry shall be made in the Oil Record Book referred to in Regulation 20 of this Annex.

(4) Any oil tanker which is not required to be provided with segregated ballast tanks in accordance with paragraph (1) of this Regulation may, however, be qualified as a segregated ballast tanker, provided that in the case of an oil tanker of 150 metres in length and above it fully complies with the requirements of paragraphs (2) and (3) of this Regulation and in the case of an oil tanker of less than 150 metres in length the segregated ballast conditions shall be to the satisfaction of the Administration.

(1) Except as provided in paragraph (2) of this Regulation, in new ships of 4,000 tons gross tonnage and above other than oil tankers, and in new oil tankers of 150 tons gross tonnage and above, no ballast water shall be carried in any oil fuel tank.

(2) Where abnormal conditions or the need to carry large quantities of oil fuel render it necessary to carry ballast water which is not a clean ballast in any oil fuel tank, such ballast water shall be discharged to reception facilities or into the sea in compliance with Regulation 9 using the equipment specified in Regulation 16(2) of this Annex, and an entry shall be made in the Oil Record Book to this effect.

(3) All other ships shall comply with the requirements of paragraph (1) of this Regulation as far as reasonable and practicable.

(1) Subject to the provisions of paragraphs (5) and (6) of this Regulation, oil tankers of 150 tons gross tonnage and above shall be provided with arrangements in accordance with the requirements of paragraphs (2) and (3) of this Regulation, provided that in the case of existing tankers the requirements for oil discharge monitoring and control systems and slop tank arrangements shall apply three years after the date of entry into force of the present Convention.

(2) (a) Adequate means shall be provided for cleaning the cargo tanks and transferring the dirty ballast residue and tank washings from the cargo tanks into a slop tank approved by the Administration. In existing oil tankers, any cargo tank may be designated as a slop tank.

(b) In this system arrangements shall be provided to transfer the oily waste into a slop tank or combination of slop tanks in such a way that any effluent discharged into the sea will be such as to comply with the provisions of Regulation 9 of this Annex.

(c) The arrangements of the slop tank or combination of slop tanks shall have a capacity necessary to retain the slops generated by tank washing, oil residues and dirty ballast residues but the total shall be not less than 3 per cent of the oil carrying capacity of the ship, except that, where segregated ballast tanks are provided in accordance with Regulation 13 of this Annex, or where arrangements such as eductors involving the use of water additional to the washing water are not fitted, the Administration may accept 2 per cent. New oil tankers over 70,000 tons deadweight shall be provided with at least two slop tanks.

(d) Slop tanks shall be so designed particularly in respect of the position of inlets, outlets, baffles or weirs where fitted, so as to avoid excessive turbulence and entrainment of oil or emulsion with the water.

(3) (a) An oil discharge monitoring and control system approved by the Administration shall be fitted. In considering the design of the oil content meter to be incorporated in the system, the Administration shall have regard to the specification recommended by the Organization.*@Z_FNOT ENTRY_7 = *( Reference is made to the Recommendation on International Performance Specifications for Oily\_Water Separating Equipment and Oil Content Meters \tab adopted by the Organization by Resolution\~A.233(VII).> The system shall be fitted with a recording device to provide a continuous record of the discharge in litres per nautical mile and total quantity discharged, or the oil content and rate of discharge. This record shall be identifiable as to time and date and shall be kept for at least three years. The oil discharge monitor and control system shall come into operation when there is any discharge of effluent into the sea and shall be such as will ensure that any discharge of oily mixture is automatically stopped when the instantaneous rate of discharge of oil exceeds that permitted by Regulation 9(1)(a) of this Annex. Any failure of this monitoring and control system shall stop the discharge and be noted in the Oil Record Book. A manually operated alternative method shall be provided and may be used in the event of such failure, but the defective unit shall be made operable before the oil tanker commences its next ballast voyage unless it is proceeding to a repair port. Existing oil tankers shall comply with all of the provisions specified above except that the stopping of the discharge may be performed manually and the rate of discharge may be estimated from the pump characteristic.

(b) Effective oil/water interface detectors approved by the Administration shall be provided for a rapid and accurate determination of the oil/water interface in slop tanks and shall be available for use in other tanks where the separation of oil and water is effected and from which it is intended to discharge effluent direct to the sea.

(c) Instructions as to the operation of the system shall be in accordance with an operational manual approved by the Administration. They shall cover manual as well as automatic operations and shall be intended to ensure that at no time shall oil be discharged except in compliance with the conditions specified in Regulation 9 of this Annex.****( Reference is made to ‘Clean Seas Guide for Oil Tankers’, published by the International Chamber of Shipping and the Oil Companies International \tab Marine Forum.>

(4) The requirements of paragraphs (1), (2) and (3) of this Regulation shall not apply to oil tankers of less than 150 tons gross tonnage, for which the control of discharge of oil under Regulation 9 of this Annex shall be effected by the retention of oil on board with subsequent discharge of all contaminated washings to reception facilities. The total quantity of oil and water used for washing and returned to a storage tank shall be recorded in the Oil Record Book. This total quantity shall be discharged to reception facilities unless adequate arrangements are made to ensure that any effluent which is allowed to be discharged into the sea is effectively monitored to ensure that the provisions of Regulation 9 of this Annex are complied with.

(5) The Administration may waive the requirements of paragraphs (1),(2) and (3) of this Regulation for any oil tanker which engages exclusively on voyages both of 72 hours or less in duration and within 50 miles from the nearest land, provided that the oil tanker is not required to hold and does not hold an International Oil Pollution Prevention Certificate (1973). Any such waiver shall be subject to the requirement that the oil tanker shall retain on board all oily mixtures for subsequent discharge to reception facilities and to the determination by the Administration that facilities available to receive such oily mixtures are adequate.

(6) Where in the view of the Organization equipment required by Regulation 9(1)(a)(vi) of this Annex and specified in sub-paragraph (3)(a) of this Regulation is not obtainable for the monitoring of discharge of light refined products (white oils), the Administration may waive compliance with such requirement, provided that discharge shall be permitted only in compliance with procedures established by the Organization which shall satisfy the conditions of Regulation 9(1)(a) of this Annex except the obligation to have an oil discharge monitoring and control system in operation. The Organization shall review the availability of equipment at intervals not exceeding twelve months.

(7) The requirements of paragraphs (1), (2) and (3) of this Regulation shall not apply to oil tankers carrying asphalt, for which the control of discharge of asphalt under Regulation 9 of this Annex shall be effected by the retention of asphalt residues on board with discharge of all contaminated washings to reception facilities.

Regulation 16 Oil Discharge Monitoring and Control System and Oily-Water Separating Equipment

(1) Any ship of 400 tons gross tonnage and above shall be fitted with an oily-water separating equipment or filtering system complying with the provisions of paragraph (6) of this Regulation. Any such ship which carries large quantities of oil fuel shall comply with paragraph 2 of this Regulation or paragraph (1) of Regulation 14. (2) Any ship of 10,000 tons gross tonnage and above shall be fitted:

(a) in addition to the requirements of paragraph (1) of this Regulation with an oil discharge monitoring and control system complying with paragraph (5) of this Regulation; or

(b) as an alternative to the requirements of paragraph (1) and subparagraph (2)(a) of this Regulation, with an oily-water separating equipment complying with paragraph (6) of this Regulation and an effective filtering system, complying with paragraph (7) of this Regulation.

(3) The Administration shall ensure that ships of less than 400 tons gross tonnage are equipped, as far as practicable, to retain on board oil or oily mixtures or discharge them in accordance with the requirements of Regulation 9(1)(b) of this Annex.

(4) For existing ships the requirements of paragraphs (1), (2) and (3) of this Regulation shall apply three years after the date of entry into force of the present Convention.

(5) An oil discharge monitoring and control system shall be of a design approved by the Administration. In considering the design of the oil content meter to be incorporated into the system, the Administration shall have regard to the specification recommended by the Organization.**( Reference is made to the Recommendation on International Performance Specifications for Oily\_Water Separating Equipment and Oil Content Meters \tab adopted by the Organization by Resolution A.233(VII).> The system shall be fitted with a recording device to provide a continuous record of the oil content in parts per million. This record shall be identifiable as to time and date and shall be kept for at least three years. The monitoring and control system shall come into operation when there is any discharge of effluent into the sea and shall be such as will ensure that any discharge of oily mixture is automatically stopped when the oil content of effluent exceeds that permitted by Regulation 9(1)(b) of this Annex. Any failure of this monitoring and control system shall stop the discharge and be noted in the Oil Record Book. The defective unit shall be made operable before the ship commences its next voyage unless it is proceeding to a repair port. Existing ships shall comply with all of the provisions specified above except that the stopping of the discharge may be performed manually.

(6) Oily-water separating equipment or an oil filtering system shall be of a design approved by the Administration and shall be such as will ensure that any oily mixture discharged into the sea after passing through the separator or filtering systems shall have an oil content of not more than 100 parts per million. In considering the design of such equipment, the Administration shall have regard to the specification recommended by the Organization.*@Z_FNOT ENTRY_7 = *( Reference is made to the Recommendation on International Performance Specifications for Oily\_Water Separating Equipment and Oil Content Meters \tab adopted by the Organization by Resolution A.233(VII).>

(7) The oil filtering system referred to in paragraph (2)(b) of this Regulation shall be of a design approved by the Administration and shall be such that it will accept the discharge from the separating system and produce an effluent the oil content of which does not exceed 15 parts per million. lt shall be provided with alarm arrangements to indicate when this level cannot be maintained.

(1) Every ship of 400 tons gross tonnage and above shall be provided with a tank or tanks of adequate capacity, having regard to the type of machinery and length of voyage, to receive the oily residues (sludges) which cannot be dealt with otherwise in accordance with the requirements of this Annex, such as those resulting from the purification of fuel and lubricating oils and oil leakages in the machinery spaces.

(2) In new ships, such tanks shall be designed and constructed so as to facilitate their cleaning and the discharge of residues to reception facilities. Existing ships shall comply with this requirement as far as is reasonable and practicable.

(1) In every oil tanker, a discharge manifold for connexion to reception facilities for the discharge of dirty ballast water or oil contaminated water shall be located on the open deck on both sides of the ship.

(2) In every oil tanker, pipelines for the discharge to the sea of effluent which may be permitted under Regulation 9 of this Annex shall be led to the open deck or to the ship's side above the waterline in the deepest ballast condition. Different piping arrangements to permit operation in the manner permitted in subparagraphs (4)(a) and (b) of this Regulation may be accepted.

(3) In new oil tankers means shall be provided for stopping the discharge of effluent into the sea from a position on upper deck or above located so that the manifold in use referred to in paragraph (1) of this Regulation and the effluent from the pipelines referred to in paragraph (2) of this Regulation may be visually observed. Means for stopping the discharge need not be provided at the observation position if a positive communication system such as telephone or radio system is provided between the observation position and the discharge control position.

(a) Segregated ballast and clean ballast may be discharged below the waterline in ports or at offshore terminals.

(b) Existing ships which, without modification, are not capable of discharging segregated ballast above the waterline may discharge segregated ballast below the waterline provided that an examination of the tank immediately before the discharge has established that no contamination with oil has taken place.

To enable pipes of reception facilities to be connected with the ship's discharge pipeline for residues from machinery bilges, both lines shall be fitted with a standard discharge connection in accordance with the following table:

Description	Dimension
Outside diameter	215mm
Inner diameter	According to pipe outside diameter
Bolt circle diameter	183 mm
Slots in flange	6 holes 22 mm in diameter equidistantly placed on a bolt circle of the above diameter, slotted to the flange periphery. The slot width to be 22 mm.
Flange thickness	20 mm
Bolts and nuts: quantity, diameter	6, each of 20 mm in diameter and of suitable length
The flange is designed to accept pipes up to a maximum internal diameter of 125 mm and shall be of steel or other equivalent material having a flat face. This flange, together with a gasket of oilproof material, shall be suitable for a service pressure of 6 kg/cm2.

(1) Every oil tanker of 150 tons gross tonnage and above and every ship of 400 tons gross tonnage and above other than an oil tanker shall be provided with an Oil Record Book, whether as part of the ship's official log book or otherwise, in the form specified in Appendix III to this Annex.

(2) The Oil Record Book shall be completed on each occasion, on a tank-to-tank basis, whenever any of the following operations take place in the ship:

(iii) opening or closing before and after loading and unloading operations of valves or similar devices which inter-connect cargo tanks;

(iv) opening or closing of means of communication between cargo piping and seawater ballast piping;

(v) opening or closing of ships' side valves before, during and after loading and unloading operations;

(xii) discharge overboard of bilge water which has accumulated in machinery spaces whilst in port, and the routine discharge at sea of bilge water which has accumulated in machinery spaces.

(ii) discharge of ballast or cleaning water from tanks referred to under (i) of this sub-paragraph;

(iv) discharge overboard of bilge water which has accumulated in machinery spaces whilst in port, and the routine discharge at sea of bilge water which has accumulated in machinery spaces.

(3) In the event of such discharge of oil or oily mixture as is referred to in Regulation 11 of this Annex or in the event of accidental or other exceptional discharge of oil not excepted by that Regulation, a statement shall be made in the Oil Record Book of the circumstances of, and the reasons for, the discharge.

(4) Each operation described in paragraph (2) of this Regulation shall be fully recorded without delay in the Oil Record Book so that all the entries in the book appropriate to that operation are completed. Each section of the book shall be signed by the officer or officers in charge of the operations concerned and shall be countersigned by the Master of the ship. The entries in the Oil Record Book shall be in an official language of the State whose flag the ship is entitled to fly, and, for ships holding an International Oil Pollution Prevention Certificate (1973) in English or French. The entries in an official national language of the State whose flag the ship is entitled to fly shall prevail in case of a dispute or discrepancy.

(5) The Oil Record Book shall be kept in such a place as to be readily available for inspection at all reasonable times and, except in the case of unmanned ships under tow, shall be kept on board the ship. It shall be preserved for a period of three years after the last entry has been made.

(6) The competent authority of the Government of a Party to the Convention may inspect the Oil Record Book on board any ship to which this Annex applies while the ship is in its port or offshore terminals and may make a copy of any entry in that book and may require the Master of the ship to certify that the copy is a true copy of such entry. Any copy so made which has been certified by the Master of the ship as a true copy of an entry in the ship's Oil Record Book shall be made admissible in any judicial proceedings as evidence of the facts stated in the entry. The inspection of an Oil Record Book and the taking of a certified copy by the competent authority under this paragraph shall be performed as expeditiously as possible without causing the ship to be unduly delayed.

Fixed and floating drilling rigs when engaged in the exploration, exploitation and associated offshore processing of sea-bed mineral resources and other platforms shall comply with the requirements of this Annex applicable to ships of 400 tons gross tonnage and above other than oil tankers, except that:

(a) they shall be equipped as far as practicable with the installations required in Regulations 16 and 17 of this Annex;

(b) they shall keep a record of all operations involving oil or oily mixture discharges, in a form approved by the Administration; and

(c) in any special area and subject to the provisions of Regulation 11 of this Annex, the discharge into the sea of oil or oily mixture shall be prohibited except when the oil content of the discharge without dilution does not exceed 15 parts per million.

(1) For the purpose of calculating hypothetical oil outflow from oil tankers, three dimensions of the extent of damage of a parallelepiped on the side and bottom of the ship are assumed as follows. In the case of bottom damages two conditions are set forth to be applied individually to the stated portions of the oil tanker.

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving either after or forward bulkhead bounding the 
machinery space located aft. The machinery space shall be 
treated as a single floodable compartment;

c) in tankers not exceeding 150 metres in length,
anywhere in the ship's length between adjacent transverse 
bulkheads with the exception of the machinery space. For 
tankers of 100 metres or less in length where all 
requirements of paragraph (3) of this Regulation cannot be 
fulfilled without materially impairing the operational 
qualities of the ship, Administrations may allow relaxations 
from these requirements.

Ballast conditions where the tanker is not carrying oil in 
cargo tanks excluding any oil residues, shall not be 
considered.

2. The following provisions regarding the extent and the 
character of the assumed damage shall apply:

a) The extent of side or bottom damage shall be as specified 
in Regulation 22 of this Annex, except that the longitudinal 
extent of the bottom damage within 0.3L from the forward 
perpendicular shall be the same as for side damage, as 
specified in Regulation 22 (1)(a)(i) of this Annex. If any 
damage of lesser extent results in a more severe condition 
such damage shall be assumed.

b) Where the damage involving transverse bulkheads is 
envisaged as specified in subparagraphs (1)(a) and (b) of 
this Regulation, transverse watertight bulkheads shall be 
spaced at least at a distance equal to the longitudinal 
extent of assumed damage specified in sub-paragraph (a) of 
this paragraph in order to be considered effective. Where 
transverse bulkheads are spaced at a lesser distance, one or 
more of these bulkheads within such extent of damage shall be 
assumed as non-existent for the purpose of determining 
flooded compartments.

c) Where the damage between adjacent transverse watertight 
bulkheads is envisaged as specified in sub-paragraph (1)(c) 
of this Regulation, no main transverse bulkhead or a 
transverse bulkhead bounding side tanks or double bottom 
tanks shall be assumed damaged, unless:

(i) the spacing of the adjacent bulkheads is less than the 
longitudinal extent of assumed damage specified in sub-
paragraph (a) of this paragraph; or
(ii) there is a step or a recess in a transverse bulkhead of 
more than 3.05 metres in length, located within the extent of 
penetration of assumed damage. The step forward by the after 
peak bulkhead and after peak tank top shall not be regarded 
as a step for the purpose of this Regulation.

d) If pipes, ducts or tunnels are situated within the assumed 
extent of damage, arrangements shall be made so that 
progressive flooding cannot thereby extend to compartments 
other than those assumed to be floodable for each case of 
damage.

3. Oil tankers shall be regarded as complying with the damage 
stability criteria if the following requirements are met:

a) The final waterline, taking into account sinkage, heel and 
trim, shall be below the lower edge of any opening through 
which progressive flooding may take place. Such openings 
shall include air pipes and those which are closed by means 
of weathertight doors or hatch covers and may exclude those 
openings closed by means of watertight manhole covers and 
flush scuttles, small watertight cargo tank hatch covers 
which maintain the high integrity of the deck, remotely 
operated watertight sliding doors, and side scuttles of the 
non-opening type,

b) In the final stage of flooding, the angle of heel due to 
unsymmetrical flooding shall not exceed 25 degrees, provided 
that this angle may be increased up to 30 degrees if no deck 
edge immersion occurs.

c) The stability in the final stage of flooding shall be 
investigated and may be regarded as sufficient if the 
righting lever curve has at least a range of 20 degrees 
beyond the position of equilibrium in association with a 
maximum residual righting lever of at least 0.1 metre. The 
Administration shall give consideration to the potential 
hazard presented by protected or unprotected openings which 
may become temporarily immersed within the range of residual 
stability.

d) The Administration shall be satisfied that the stability 
is sufficient during intermediate stages of flooding.

4. The requirements of paragraph (1) of this Regulation shall 
be confirmed by calculations which take into consideration 
the design characteristics of the ship, the arrangements, 
configuration and contents of the damaged compartments; and 
the distribution, specific gravities and the free surface 
effect of liquids. The calculations shall be based on the 
following:

a) Account shall be taken of any empty or partially filled 
tank, the specific gravity of cargoes carried, as well as any 
outflow of liquids from damaged compartments.

b) The permeabilities are assumed as follows:

Spaces	              Permeability

Appropriated to	     0.60
 stores

Occupied by	          0.95
 accommodation

Occupied by machinery   0.85

Voids	               0.95

Intended for	          0 to 0.95*
 consumable liquids

Intended for	          0 to 0.95**
 other liquids

* Whichever results in the more severe requirements.

** The permeability of partially filled compartments shall be 
consistent with the amount of liquid carried.

c) The buoyancy of any superstructure directly above the side 
damage shall be disregarded. The unflooded parts of 
superstructures beyond the extent of damage, however, may be 
taken into consideration provided that they are separated 
from the damaged space by watertight bulkheads and the 
requirements of sub-paragraph (3)(a) of this Regulation in 
respect of these intact spaces are complied with. Hinged 
watertight doors may be acceptable in watertight bulkheads in 
the superstructure.

d) The free surface effect shall be calculated at an angle of 
heel of 5 degrees for each individual compartment. The 
Administration may require or allow the free surface 
corrections to be calculated at an angle of heel greater than 
5 degrees for partially filled tanks.

e) In calculating the effect of free surfaces of consumable 
liquids it shall be assumed that, for each type of liquid at 
least one transverse pair or a single centreline tank has a 
free surface and the tank or combination of tanks to be taken 
into account shall be those where the effect of free surfaces 
is the greatest.

5. The Master of every oil tanker and the person in charge of 
a non-self-propelled oil tanker to which this Annex applies 
shall be supplied in an approved form with:

a) information relative to loading and distribution of cargo 
necessary to ensure compliance with the provisions of this 
Regulation; and

b) data on the ability of the ship to comply with damage 
stability criteria as determined by this Regulation, 
including the effect of relaxations that may have been 
allowed under sub-paragraph (1)(c) of this Regulation.


                     APPENDIX I

                       LIST OF OILS*

* The list of oils shall not necessarily be considered as 
comprehensive.

Asphalt solutions
Blending Stocks
Roofers Flux
Straight Run Residue

Oils
Clarified
Crude Oil
Mixtures containing crude oil
Diesel Oil
Fuel Oil No. 4
Fuel Oil No. 5
Fuel Oil No. 6
Road Oil
Transformer Oil
Aromatic Oil (excluding vegetable oil)
Lubricating Oils and Blending Stocks
Mineral Oil
Motor Oil
Penetrating Oil
Spindle Oil
Turbine Oil

Distillates
Straight Run
Flashed Feed Stocks

Gas Oil
Cracked

Gasoline Blending Stocks
Aklylates Ñ fuel
Reformates
Polymer Ñ fuel

Gasolines
Casinghead (natural)
Automotive
Aviation
Straight Run
Fuel Oil No. 1 (Kerosene)
Fuel Oil No. 1-D
Fuel Oil No. 2
Fuel Oil No. 2-D

Jet Fuels
JP-1 (Kerosene)
JP-3
JP-4
JP-5 (Kerosene, Heavy)
Turbo Fuel
Kerosene
Mineral Spirit

Naphtha
Solvent
Petroleum
Heartcut Distillate Oil


APPENDIX II

Form of Certificate


INTERNATIONAL OIL PREVENTION CERTIFICATE (1973)

Issued under the Provisions of the International Convention 
for the Prevention of Pollution from Ships, 1973, under the 
Authority of the Government of

...................................................
(full designation of the country)

by ............................................... (full 
designation of the competent person or organization 
authorized under the provisions of the International 
Convention for the Prevention of Pollution from Ships, 1973)

Name of Ship	 Number or
Distinctive    
Letter	Port of
Registry	Gross Tonnage
			
             
Type of ship:

Oil tanker, including combination carrier*

* Delete as appropriate

Asphalt carrier*

Ship other than oil tanker with cargo tanks coming under 
Regulation 2(2) of Annex I of the Convention* Ship other than 
any of the above*

New/existing ship*

Date of building or major conversion contract..............
                         
.........................................................

Date on which keel was laid or ship was at a similar stage of 
construction or on which major conversion was 
commenced....................................................
..................

Date of delivery or completion of major conversion........                   
......................................................


PART A

ALL SHIPS 

The ship is equipped with: 

for ships of 400 tons gross tonnage and above:

a) oily-water separating equipment* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million) or

* Delete as appropriate

b) an oil filtering system* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million)

for ships of 10,000 tons gross tonnage and above: 

c) an oil discharge monitoring and control system* 
(additional to (a) or(b) above) or

d) oil-water separating equipment and an oil filtering 
system* (capable of producing the effluent with an oil 
content not exceeding 15 pars per million) in lieu of (a) or 
(b) above.

Particulars of requirement from which exemption is granted 
under Regulation 2(2) and 2(4)(a) of Annex I of the 
Convention:

...................................................
...................................................

Remarks:



PART B

OIL TANKER

Deadweight ..................metric tons. Length of 
ship...............	metres.

It is certified that this ship is:

a) required to be constructed according to and complies with

b) not required to be constructed according to

c) nor required to be constructed according to, but complies 
with the requirements of Regulation 24 of Annex I of the 
Convention.

The capacity of segregated ballast tanks 
is...................................cubic metres and
complies with the requirements of Regulation 24 of Annex I of 
the Convention 

The segregated ballast is distributed as follows:

Tank 	Quantity	Tank	Quantity
			

    			
This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable should be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above.

2 This page need not be reproduced on a Certificate issued to 
any ship other than those referred to in footnote.1

3 Delete as appropriate


THIS IS TO CERTIFY:

That the ship has been surveyed in accordance with Regulation 
4 of Annex I of the International Covention for the 
Prevention of Pollution from Ships, 1973, concerning the 
prevention of pollution of oil; and

That the survey shows that the structure, equipment, 
fittings, arrangements and material of the ship and the 
condition thereof are in all respects, satisfactory and that 
the ship complies with the applicable requirements of Annex I 
of the Convention.

This Certificate is valid until............................

subject to intermediate survey(s) at intervals of .........

Issued at.................................................

                   (place of issue of Certificate)

........................19....   ............................
(Signature of duly                 
authorized official issuing 
the Certificate)

  (Seal or stamp of the issuing Authority, as appropriate)

Endorsement for existing ships4

4 This entry need not be reproduced on a Certificate other 
than the first Certificate issued to any ship.

This is to certify that this ship has been so equipped as to 
comply with the requirements of the International Convention 
for the Prevention of Pollution from Ships, 1973 as relating 
to existing ships three years from the date of entry into 
force of the Convention.

signed ....................
                                    
signed......................
(Signature of duly authorized         
official)

Place of endorsement 
................................

Date of endorsement 
...............................

      (Seal or stamp of the Authority, as appropriate)


                 Intermediate survey

This is to certify that at an intermediate survey required by 
Regulation 4(1)(c) of Annex I of the Convention, this ship 
and the condition thereof are found to comply with the 
relevant provisions of the Convention.

Signed .....................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)


 Signed.....................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)

Under the provisions of Regulation 8(2) and (4) of Annex I of 
the Convention the validity of this Certificate is extended 
until
.................................................

                             
Signed......................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)



APPENDIX III

FORM OF OIL RECORD BOOK

OIL RECORD BOOK

I Ñ FOR OIL TANKERS1

1 This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable shall be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above. This Part need not be reproduced on an Oil Record Book 
issued to any ship other than those referred to above.

Name of ship ......................... 

Total cargo carrying capacity of ship in cubic metres 
......................................................Voyage 
..........(date).....to .............	(date)
 
a) Loading of oil cargo
1. Date and
place of
loading			
2. Types of
oil loaded			
3. Identity
of tank(s)
loaded			
4. Closing
of applic-
able cargo
tank valves
and applic-
able line
cut-off
valves on
completion
of loading2			

2 Applicable valves and similar devices are those referred to 
in Regulations 20(2)(a)(iii), 23 and 24 of Annex I of the 
Convention.

The undersigned certifies that in addition to the above, all 
sea valves, overboard discharges valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of loading oil cargo.

Date of entry..........    Officer in charge..............

                           Master ........................

b) Internal transfer of oil cargo during voyage

5. Date of
internal transfer		
6. Identity of
tank(s)	
 (i) From	
	(ii) To	
7. Was(were)
tank(s) in 6(i)
emptied?		

The undersigned certifies that in addition to the above, all 
sea valves overboard discharge valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of internal transfer of oil cargo.

Date of entry............. Officer in charge...........
                        Master..................

c) Unloading of oil cargo

8. Date and place of unloading

9. Identity of tank(s) unloaded

10. Was(were) tank(s) emptied?  

11. Opening of applicable cargo tank valves and applicable 
line cut-off valves on completion of unloading2

12. Closing of applicable cargo tank valves and applicable 
line cut off valves on completion of unloading2

2 Applicable valves and similar devices are those referred to 
in Regulation 20(2)(a)(iii), 23 and 24 of Annex I of the 
Convention.

The tank certifies that in addition to the above, all sea 
valves, overboard discharge valves, cargo tank and pipeline 
connections and inter-connections, were secured on completion 
of unloading of oil cargo.

Date of entry...........Officer in charge.............. 
	                   Master .......................

d) Ballasting of cargo tanks

13. Identity of tank(s) ballasted

14. Date and position of ship at start of ballasting

15. If valves connecting cargo lines and segregated ballast 
lines were used give time, date and position of ship when 
valves were (a) opened, and (b) closed

 The undersigned certifies that in addition to the above, all 
sea valves, overboard discharge valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of unloading of oil cargo.

Date of entry.............. Officer in charge................

                            Master ......................

e) Cleaning of cargo tanks
 
16. Identity of tank(s) cleaned
17. Date and duration of cleaning
18. Methods of cleaning3

3 Hand hosing, machine washing and/or chemical cleaning. 
Where chemically cleaned, the chemical concerned and the 
amount used should be stated.

Date of entry...............Officer in charge ............

                            Master ......................

f) Discharge of dirty ballast

19. Identity of tank(s)

20. Date and position of ship at start of discharge to sea

21. Date and position of ship at finish of discharge to sea

22. Ship's speed(s) during discharge

23. Quantity discharged to sea

24. Quantity of polluted water transferred to slop tank(s) 
(identify slop tank(s)

25. Date and port of discharge into shore reception 
facilities (if applicable)

26. Was any part of the discharge conducted during darkness, 
if so, for how long?

27. Was a regular check kept on the effluent and the surface 
of the water in the locality of the discharge?

28. Was any oil observed on the surface of the water in the 
locality of the discharge?


Date of entry.............   Officer in charge .............

                             Master.........................

g) Discharge of water from slop tanks

29. Identity of slop tank(s)

30. Time of settling from last entry of residues, or

31. Time of settling from last discharge

32. Date, time and position of ship at start of discharge

33. Sounding of total contents at start of discharge

34. Sounding of oil/water interface at start of discharge

35. Bulk quantity discharged and rate of discharge

36. Final quantity discharged and rate of discharge

37. Date, time and position of ship at end of discharge

38. Ship's speed(s) during discharge

39. Sounding of oil/water interface at end of discharge

40. Was any part of the discharge conducted during darkness, 
if so, for how long?

41. Was a regular check kept on the effluent and surface of 
the water in the locality of the discharge?

42. Was any oil observed on the surface of the water in the 
locality of the discharge?

Date of entry.............   Officer in charge .............

                             Master.........................


h) Disposal of residues

43. Identity of tank(s)

44. Quantity disposed from each tank

45. Method of disposal of residue:
     (a) Reception of facilities
     (b) Mixed with cargo
     (c) Transferred to another (other)
     tank(s) (identify tank(s)
     (d) Other method (state which)

46. Date and port of disposal of residue

Date of entry.............   Officer in charge .............

                             Master.........................


i) Discharge of clean ballast contained in cargo tanks

47. Date and position of ship at commencement of discharge of 
clean ballast

48. Identity of tank(s) discharged

49. Was(were) the tank(s) empty on completion?

50. Position of vessel on completion if different from 47

51. Was any part of the discharge conducted during darkness, 
if so, for how long?

52. Was a regular check kept on the effluent and the surface 
of the water in the locality of the discharge?

53. Was any oil observed on the surface of the water in the 
locality of the discharge?

Date of entry.............   Officer in charge .............

                             Master.........................


j) Discharge overboard of bilge water containing oil which 
has accumulated in machinery spaces whilst in port4

4 Where the pump starts automatically and discharges through 
a separator at all times it will be sufficient to enter each 
day "Automatic discharge from bilges through a separator".

54. Port

55. Duration of stay

56. Quantity disposed

57. Date and place of disposal

58. Method of disposal (state whether a separator was used)

Date of entry.............   Officer in charge .............

                             Master.........................


k) Accidental or other exceptional discharges of oil

59. Date and time of occurrence

60. Place or position of ship at time of occurrence

61. Approximate quantity and type of oil

62. Circumstances of discharge or escape, the reasons 
therefor and general remarks

Date of entry.............   Officer in charge .............

                             Master.........................

1. Has the oil monitoring and control system been out of 
operation at any time when discharging overboard? If so, give 
time and date of failure and time and date of restoration and 
confirm that this was due to equipment failure and state 
reason if 
known........................................................
.......................................................

Date of entry.............   Officer in charge .............

                             Master.........................

(m) Additional operational procedures and general remarks 
.........................................

 For oil tankers of less than 150 tons gross tonnage 
operating in accordance with Regulation 15(4) of Annex I of 
the Convention, an appropriate oil record book should be 
developed by the Administration.

 For asphalt carriers, a separate oil record book may be 
developed by the Administration utilizing sections (a), (b), 
(c), (e), (h), (j), (k) and (m) of this form of oil record 
book.


II Ñ FOR SHIPS OTHER THAN OIL TANKERS

Name of ship ............................

Operations from.............(date), to ..........(date)


a) Ballasting or cleaning of oil fuel tanks

1. Identity of tank(s) ballasted

2. Whether cleaned since they last contained oil, and if not, 
type of oil previously carried

3. Date and position of ship at start of cleaning

4. Date and position of ship at start of ballasting

Date of entry.............   Officer in charge .............

                             Master.........................

b) Discharge of dirty ballast or cleaning water from tanks 
referred to under section (a)

5. Identity of tank(s)

6. Date and position of ship at start of discharge

7. Date and position of ship at finish of discharge

8. Ship's speed(s) during discharge

9. Method of discharge (state whether to reception facility 
or through installed equipment)

10. Quantity discharged

Date of entry.............   Officer in charge .............

                             Master.........................


c) Disposal of residues

11. Quantity of residue retained on board

12. Methods of disposal of residue: 
    (a) reception facilities 
    (b) mixed with next bunkering 
    (c) transferred to another (other) tank 
    (d) other method (state which)

13. Date and port of disposal of residue

Date of entry.............   Officer in charge .............

                             Master.........................


d) Discharge overboard of bilge water containing oil which 
has accumulated in machinery spaces whilst in port5

5 Where the pump starts automtically and discharges through a 
separator at all times it will be sufficient to enter each 
day "Automatic discharge from bilges through a separator".

14. Port

15. Duration of stay

16. Quantity disharged

17. Date and place of discharge

18. Method of discharge:
    (a) through oily-water separating equipment
    (b) through oil filtering system;
    (c) through oily-water separating equipment and an      
oil filtering system;
    (d) to reception facilities

Date of entry.............   Officer in charge .............

                             Master.........................


e) Accidental or other exceptional discharges of oil

19. Date and time of occurrence

20. Place or position of ship at time of occurrence

21. Approximate quantity and type of oil

22. Circumstances of discharge or escape, the reasons 
therefor and general remarks

Date of entry.............   Officer in charge .............

                             Master.........................


f) Has the required oil monitoring and control system been 
out of operation at any time when discharging overboard? If 
so, state time and date of failure and time and date of 
restoration, and confirm that this was due to equipment 
failure, and state reason if known.

Date of entry.............   Officer in charge .............

                             Master.........................


g) New ships of 4,000 tons gross tonnage and above has dirty 
ballast been carried in oil fuel tanks?

                                    Yes/No.......... 

If so, state which tanks were so ballasted and method of 
discharge of the dirty ballast 
......................................................
......................................................

Date of entry.............   Officer in charge .............

                             Master.........................


h) Additional operational procedures and general 
remarks..............................................

......................................................

Date of entry.............   Officer in charge .............

                             Master.........................

THE MARINE MAMMAL COMMISSION COMPENDIUM

MULTILATERAL / MARINE POLLUTION
Volume(s) 1-3; pages 1834-1915

_________

======================================

International Convention for the Prevention of Pollution from Ships, London, 1973

________________________________

Name of Ship	Distinctive Number or Letter	Port of Registry	Gross Tonnage

________________________________________ THE MARINE MAMMAL COMMISSION COMPENDIUM MULTILATERAL / MARINE POLLUTIONVolume(s) 1-3; pages 1834-1915 _________________________________________________

======================================

International Convention for the Prevention of Pollution from Ships, London, 1973 ________________________________

THE MARINE MAMMAL COMMISSION COMPENDIUM

MULTILATERAL / MARINE POLLUTION
Volume(s) 1-3; pages 1834-1915

_________

International Convention for the Prevention of Pollution from Ships, London, 1973

________________________________