Protocol of 1978 Relating to the International Convention for 
the Prevention of Pollution from Ships 

Done at London 17 February 1978 

The Parties to the present Protocol, 

Recognizing the significant contribution which can be made by 
the International Convention for the Prevention of Pollution 
from Ships, 1973, to the protection of the marine environment 
from pollution from ships, 

Recognizing also the need to improve further the prevention and 
control of marine pollution from ships, particularly oil 
tankers, 

Recognizing further the need for implementing the Regulation for 
the Prevention of Pollution by Oil contained in Annex I of that 
Convention as early and as widely as possible, 

Acknowledging however the need to defer the application of Annex 
II of that Convention until certain technical problems have been 
satisfactorily resolved. 

Considering that these objections may best be achieved by the 
conclusion of a Protocol relating to the International 
Convention for the Prevention of Pollution from Ships, 1973, 

Have agreed as follows: 

Article I 

GENERAL OBLIGATIONS 

1. The Parties to the present Protocol undertake to give effect 
to the provisions of: 

a) the present Protocol and the Annex hereto which shall 
constitute an integral part of the present Protocol; and 

b) the International Convention for the Prevention of Pollution 
from Ships, 1973 (hereinafter referred to as "the Convention"), 
subject to the modifications and additions set out in the 
present Protocol. 

2. The provisions of the Convention and the present Protocol 
shall be read and interpreted together as one single instrument. 

3. Every reference to the present Protocol constitutes at the 
same time a reference to the Annex hereto. 

Article II 

IMPLEMENTATION OF ANNEX II OF THE CONVENTION 

1. Notwithstanding the provisions of Article 14(1) of the 
Convention, the Parties to the present Protocol agree that they 
shall not be bound by the provisions of Annex II of the 
Convention for a period of three years from the date of entry 
into force of the present Protocol or for such longer period as 
may be decided by a two-thirds majority of the Parties to the 
present Protocol in the Marine Environment Protection Committee 
(hereinafter referred to as "the Committee") of the 
Inter-Governmental Maritime Consultative Organization 
(hereinafter referred to as "the Organization"). 

2. During the period specified in paragraph 1 of this Article, 
the Parties to the present Protocol shall not be under any 
obligations nor entitled to claim any privileges under the 
Convention in respect of matters relating to Annex II of the 
Convention and all reference to Parties in the Convention shall 
not include the Parties to the present Protocol in so far as 
matters relating to that Annex are concerned. 

Article III 

COMMUNICATION OF INFORMATION 

The text of Article 11(1)(b) of the Convention is replaced by 
the following: 

"a list of nominated surveyors or recognized organizations which 
are authorized to act on their behalf in the administration of 
matters relating to the design, construction, equipment and 
operation of ships carrying harmful substances in accordance 
with the provisions of the Regulations for circulation to the 
Parties for information of their officers. The Administration 
shall therefore notify the Organization of the specific 
responsibilities and conditions of the authority delegated to 
nominated surveyors or recognized organizations." 

Article IV 

SIGNATURE, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION 

1. The present Protocol shall be open for signature at the 
Headquarters of the Organization from 1 June 1978 to 31 May 1979 
and shall thereafter remain open for accession. States may 
become Parties to the present Protocol 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 

c) accession. 

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. 

Article V 

ENTRY INTO FORCE 

1. The present Protocol shall enter into force twelve months 
after the date on which not less than fifteen 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 IV of the 
present Protocol. 

2. Any instrument of ratification, acceptance, approval or 
accession deposited after the date on which the present Protocol 
enters into force shall take effect three months after the date 
of deposit. 

3. After the date on which an amendment to the present Protocol 
is deemed to have been accepted in accordance with Article 16 of 
the Convention, any instrument of ratification, acceptance, 
approval or accession deposited shall apply to the present 
Protocol as amended. 

Article VI 

AMENDMENTS 

The procedures set out in Article 16 of the Convention in 
respect of amendments to the Articles, an Annex and an Appendix 
to an Annex of the Convention shall apply respectively to 
amendments to the Articles, the Annex and an Appendix to the 
Annex of the present Protocol. 

Article VII 

DENUNCIATION 

1. The present Protocol may be denounced by any Party to the 
present Protocol at any time after the expiry of five years from 
the date on which the Protocol enters into force for that Party. 

2. Denunciation shall be effected by the deposit of an 
instrument of denunciation with the Secretary-General of the 
Organization. 

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

Article VIII 

DEPOSITARY 

1. The present Protocol shall be deposited with the 
Secretary-General of the Organization (hereinafter referred to 
as "the Depositary"). 

2. The Depositary shall: 

a) inform all States which have signed the present Protocol or 
acceded thereto of: 

(i) each new signature or deposit of an instrument of 
ratification, acceptance, approval or accession, together with 
the date thereof; 

(ii) the date of entry into force of the present Protocol; 

(iii) the deposit of any instrument of denunciation of the 
present Protocol together with the date on which it is received 
and the date on which the denunciation takes effect. 

(iv) any decisions made in accordance with Article II(1) of the 
present Protocol; 

b) transmit certified true copies of the present Protocol to all 
States which have signed the present Protocol or acceded 
thereto. 

3. As soon as the present Protocol enters into force, a 
certified true copy thereof shall be transmitted by the 
Depositary to the Secretariat of the United Nations for 
registration and publication in accordance with Article 102 of 
the Charter of the United Nations. 

Article IX 

LANGUAGE 

The present Protocol is established in a single original in the 
English, French, Russian and Spanish language, 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 Protocol. 

Done at London this seventeenth day of February one thousand 
nine hundred and seventy-eight. 

Annex: Modifications and Additions to the International 
Convention for the Prevention of Pollution from Ships, 1973 

ANNEX I: REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL 

Regulation 1 

DEFINITIONS 

Paragraphs (1) to (7) - No change 

The existing text of paragraph (8) is replaced by the following: 

8. a) 'Major conversion' means a conversion of an existing ship: 

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

(ii) which changes the type of the ship; or 

(iii) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

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

b) Notwithstanding the provisions of subparagraph (a) of this 
paragraph, conversion of an existing oil tanker of 20,000 tons 
deadweight and above to meet the requirements of Regulation 13 
of this Annex shall not be deemed to constitute a major 
conversion for the purpose of this Annex. 

Paragraph (9) to (22) _ No change 

The existing text of paragraph (23) is replaced by the 
following: 

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

Paragraphs (24) and (25) _ No change 

The following paragraphs are added to the existing text: 

(26) Notwithstanding the provisions of paragraph (6) of this 
Regulation, for the purposes of Regulation 13, 13B, 13E and 18 
(5) of this Annex, "new oil tanker" means an oil tanker: 

a) for which the building contract is placed after 1 June 1979; 
or 

b) in the absence of a building contract, the keel of which is 
laid, or which is at a similar stage of construction after 1 
January 1979; or 

c) the delivery of which is after 1 June 1982; or 

d) which has undergone a major conversion: 

(i) for which the contract is placed after 1 June 1979; or 

(ii) in the absence of a contract, the construction work of 
which is begun after 1 January 1980; or 

(iii) which is completed after 1 June 1982, except that, for oil 
tankers of 70,000 tons deadweight and above, the definition in 
paragraph (6) of this Regulation shall apply for the purposes of 
Regulation 13(1) of this Annex. 

(27) Notwithstanding the provisions of paragraph (7) of this 
Regulation, for the purposes of Regulations 13, 13A, 13B, 13C, 
13D and 18(6) of this Annex, "existing oil tanker" means an oil 
tanker which is not a new oil tanker as defined in paragraph 
(26) of this Regulation. 

(28) "Crude Oil" means any liquid hydrocarbon mixture occurring 
naturally in the earth whether or not treated to render it 
suitable for transportation and includes: 

a) crude oil from which certain distillate fractions may have 
been removed; and 

b) crude oil to which certain distillate fractions may have been 
added. 

(29) "Crude oil tanker" means an oil tanker engaged in the trade 
of carrying crude oil. 

(30) "Product carrier" means an oil tanker engaged in the trade 
of carrying oil other than crude oil. 

Regulations 2 and 3 

No change 

Regulation 4 

The existing text of Regulation 4 is replaced by the following: 

Surveys and Inspections 

(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, systems, 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, 
system 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, systems, 
fittings, arrangements and material fully comply with the 
requirements of this Annex. 

c) A minimum of one intermediate survey during the period of 
validity of the Certificate which shall be such as to ensure 
that the equipment and associated pump and piping systems, 
including oil discharge monitoring and control systems, crude 
oil washing systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable requirements 
of this Annex and are in good working order. In cases where only 
one such intermediate survey is carried out in any one 
Certificate validity period, it shall be held not before six 
months prior to, nor later than six months after the half-way 
date of the Certificate's period of validity. Such intermediate 
surveys shall be endorsed on the Certificate 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. a) Surveys of ships as regards the 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. 

b) The Administration shall institute arrangements for 
unscheduled inspections to be carried out during the period of 
validity of the Certificate. Such inspections shall ensure that 
the ship and its equipment remain in all respects satisfactory 
for the services for which the ship is intended. These 
inspections may be carried out by their own inspection services, 
or by nominated surveyors or by recognized organizations, or by 
other Parties upon request of the Administration. Where the 
Administration, under the provisions of paragraph (1) of this 
Regulation, establishes mandatory annual surveys, the above 
unscheduled inspections shall not be obligatory. 

c) An Administration nominating surveyors or recognizing 
organizations to conduct surveys and inspections as set forth in 
sub-paragraphs (a) and (b) of this paragraph, shall as a minimum 
empower any nominated surveyor or recognized organization to: 

(i) require repairs to a ship; and 

(ii) carry out surveys and inspections if requested by the 
appropriate authorities of a Port State. 

The Administration shall notify the Organization of the specific 
responsibilities and conditions of the authority delegated to 
the nominated surveyors or recognized organizations, for 
circulation to Parties to the present Protocol for the 
information of their officers. 

(d) When a nominated surveyor or recognized organization 
determines that the condition of the ship or its equipment does 
not correspond substantially with the particulars of the 
Certificate or is and there the ship is not fit to proceed to 
sea without presenting an unreasonable threat of harm to the 
marine environment, such survey or organization shall 
immediately ensure that corrective action is taken and shall in 
due course notify the Administration. If such corrective action 
is not taken the Certificate should be withdrawn and the 
Administration shall be notified immediately; and if the ship is 
in a port of another Party, the appropriate authorities of the 
Port State shall also be notified immediately. When an officer 
of the Administration, a nominated surveyor or recognized 
organization has notified the appropriate authorities of the 
Port State, the Government of the Port State concerned shall 
give such officer, surveyor or organization any necessary 
assistance to carry out their obligations under this Regulation. 
When applicable, the Government of the Port State concerned 
shall take such steps as will ensure that the ship shall not 
sail until it can proceed to sea or leave the port for the 
purpose of proceeding to the nearest appropriate repair yard 
available without presenting an unreasonable threat of harm to 
the marine environment. 

e) In every case, the Administration concerned shall fully 
guarantee the completeness and efficiency of the survey and 
inspection and shall undertake to ensure the necessary 
arrangements to satisfy this obligation. 

4. a) The condition of the ship and its equipment shall be 
maintained with the provisions of the present Protocol to ensure 
that the ship in all respects will remain fit to proceed to sea 
without presenting an unreasonable threat of harm to the marine 
environment. 

b) After any survey of the ship under paragraph (1) of this 
Regulation has been completed, no 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 and fittings. 

c) Whenever an accident occurs to a ship or a defect is 
discovered which substantially affects the integrity of the ship 
or the efficiency or completeness of its equipment covered by 
this Annex the master or owner of the ship shall report at the 
earliest opportunity to the Administration the recognized 
organization of the nominated surveyor responsible for issuing 
the relevant Certificate, who shall cause investigations to be 
initiated to determine whether a survey as required by paragraph 
(i) of this Regulation is necessary. If the ship is in port of 
another Party, the master or owner shall also report immediately 
to the appropriate authorities of the Port State and the 
nominated surveyor or recognized organization shall ascertain 
that such report has been made. 

Regulations 5, 6 and 7 

In the existing text of these Regulations, delete all reference 
to "(1973)" in relation to the International Oil Pollution 
Prevention Certificate. 

Regulation 8 

DURATION OF CERTIFICATE 

The existing text of Regulation 8 is replaced by the following: 

1. An International Oil Pollution Prevention Certificate shall 
be issued for a period specified by the Administration, which 
shall not exceed five years from the date of issue, provided 
that in the case of an oil tanker operating with dedicated clean 
ballast tanks for a limited period specified in Regulation 13(9) 
of this Annex, the period of validity of the Certificate shall 
not exceed such specified period. 

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

3. A Certificate issued to a ship shall also cease to be valid 
upon transfer of the ship to the flag of another State. A new 
Certificate shall only be issued when the Governments issuing 
the new Certificate is fully satisfied that the ship is in full 
compliance with the requirements of Regulation 4(4)(a) and (b) 
of this Annex. In the case of a transfer between Parties, if 
requested within three months after the transfer has taken 
place, the Government of the Party whose flag the ship was 
formerly entitled to fly shall transmit as soon as possible 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. 

Regulations 9 to 12 

No change 

Regulation 13 

The existing text to Regulation 13 is replaced by the following 
Regulations: 

Regulation 13 

SEGREGATED BALLAST TANKS, DEDICATED CLEAN BALLAST TANKS AND 
CRUDE OIL WASHING 

Subject to the provisions of Regulation 13C and 13D of this 
Annex, oil tanker shall comply with the requirements of this 
Regulation. 

New oil tankers 20,000 tons deadweight and above 

1. Every new crude oil tanker of 20,000 tons deadweight and 
above and every new product carrier of 30,000 tons deadweight 
and above shall be provided with segregated ballast tanks and 
shall comply with paragraphs (2), (3) and (4), or paragraph (5) 
as appropriate, 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 cargo tanks for water ballast 
except as provided for in paragraph (3) or (4) 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 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 meters (without taking 
into account any ship's deformation) shall not be less than: 

* 

dm = 2.0 + 0.02L; 

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm) as 
specified in sub-paragraphs (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 cargo tanks 
except on those rare voyages when weather conditions are so 
severe that, in the opinion of the master, it is necessary to 
carry additional ballast water in cargo tanks for the safety of 
the ship. Such additional ballast water shall be processed and 
discharged in compliance with Regulation 9 of this Annex 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. In the case of new crude oil tankers, the additional ballast 
permitted in paragraph (3) of this Regulation shall be carried 
in cargo tanks only if such tanks have been crude oil washed in 
accordance with Regulation 13B of this Annex before departure 
from an oil unloading port or terminal. 

5. Notwithstanding the provisions of paragraph (2) of this 
Regulation, the segregated ballast conditions for oil tankers 
less than 150 meters in length shall be to the satisfaction of 
the Administration. 

6. Every new crude oil tanker of 20,000 tons deadweight and 
above shall be fitted with cargo tank cleaning system using 
crude oil washing. The Administration shall undertake to ensure 
that the system fully complies with the requirements of 
Regulation 13B of this Annex within one year after the tanker 
was first engaged in the trade of carrying crude oil or by the 
end of the third voyage carrying crude oil suitable for crude 
oil washing, whichever occurs later. Unless such oil tanker 
carries crude oil which is not suitable for crude oil washing, 
the oil tanker shall operate the system in accordance with the 
requirements of that Regulation. 

Existing crude oil tankers of 40,000 tons deadweight and above 

7. Subject to the provisions of paragraphs (8) and (9) of this 
Regulation every existing crude oil tanker of 40,000 tons 
deadweight and above shall be provided with segregated ballast 
tanks and shall comply with the requirements of paragraphs (2) 
and (3) of this Regulation from the date of entry into force of 
the present Protocol. 

8. Existing crude oil tankers referred to in paragraph (7) of 
this Regulation may, in lieu of being provided with segregated 
ballast tanks, operate with a cargo tank cleaning procedure 
using crude oil washing in accordance with Regulation 13B of 
this Annex unless the crude oil tanker is intended to carry 
crude oil which is not suitable for crude oil washing. 

9. Existing crude oil tankers referred to in paragraphs (7) and 
(8) of this Regulation may, in lieu of being provided with 
segregated ballast tanks or operating with a cargo tank cleaning 
procedure using crude oil washing, operate with dedicated clean 
ballast tanks in accordance with the provisions of Regulation 
13A of this Annex for the following period: 

a) for crude oil tankers of 70,000 tons deadweight and above, 
until two years after the date of entry into force of the 
present Protocol; and 

b) Crude oil tankers of 40,000 tons deadweight and above but 
below 70,000 tons deadweight, until four years after the date of 
entry into force of the present Protocol. 

Existing product carriers of 40,000 tons deadweight and above 

(10) From the date of entry into force of the present Protocol, 
every existing product carrier of 40,000 tons deadweight and 
above shall be provided with segregated ballast tanks and shall 
comply with the requirements of paragraphs (2) and (3) of this 
Regulation, or, alternatively, operate with dedicated clean 
ballast tanks in accordance with the provisions of Regulation 
13A of this Annex. 

An oil tanker qualified as a segregated ballast oil tanker 

(11) Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1), (7) 
or (10) of this Regulation may, however, be qualified as a 
segregated ballast tanker, provided that it complies with the 
requirements of paragraphs (2) and (3), or paragraph (5) as 
appropriate, of this Regulation. 

Regulation 13A 

REQUIREMENTS FOR OIL TANKERS WITH DEDICATED CLEAN BALLAST TANKS 

1. An oil tanker operating with dedicated clean ballast tanks in 
accordance with the provisions of Regulation 13(9) or (10) of 
this Annex, shall have adequate tank capacity, dedicated solely 
to the carriage of clean ballast as defined in Regulation 1(16) 
of this Annex, to meet the requirements of Regulations 13(2) and 
(3) of this Annex. 

2. The arrangements and operational procedures for dedicated 
clean ballast tanks shall comply with the requirements 
established by the Administration. Such requirements shall 
contain at least all the provisions of the Specifications for 
Oil Tankers with Dedicated Clean Ballast Tanks adopted by the 
International Conference on Tanker Safety and Pollution 
Prevention, 1978, in Resolution 14 and as may be revised by the 
Organization. 

3. An oil tanker operating with dedicated clean ballast tanks 
shall be equipped with an oil content meter, approved by the 
Administration on the basis of specification recommended by the 
Organization*, to enable supervision of the oil content in 
ballast water being discharged. The oil content meter shall be 
installed no later than at the first scheduled shipyard visit of 
the tanker following the entry into force of the present 
Protocol. Until such time as the content meter is installed, it 
shall immediately before discharge of ballast be established by 
examination of the ballast water from dedicated tanks that no 
contamination with the oil has taken place. 

* Reference is made to the Recommendations on International 
Performance and Test Specifications for Oily-Water separating 
Equipment and Oil content meters adopted by the organization by 
Resolution A. 393 (x) 

4. Every oil tanker operating with dedicated clean ballast tanks 
shall be provided with: 

a) a Dedicated Clean Ballast Tank Operations Manual detailing 
the system and specifying operational procedures. Such a Manual 
shall be to the satisfaction of the Administration and shall 
contain all the information set out in the Specifications 
referred to in paragraph (2) of this Regulation. If an 
alteration affecting the dedicated clean ballast tank system is 
made, the Operation Manual shall be revised accordingly: and 

b) a Supplement to the Oil Record Book referred to in Regulation 
20 of this Annex as set out in Supplement 1 to Appendix III of 
this Annex. The Supplement shall be permanently attached to the 
Oil Record Book. 

Regulation 13B 

REQUIREMENTS FOR CRUDE OIL WASHING 

1. Every crude oil washing system required to be provided in 
accordance with Regulation 13(6) and (8) of this Annex shall 
comply with the requirements of this Regulation. 

2. The crude oil washing installation and associated equipment 
and arrangements shall comply with the requirements established 
by the Administration. Such requirements shall contain at least 
all the provisions of the Specifications for the Design, 
Operation and Control of Crude Oil Washing Systems adopted by 
the International Conference on Tanker Safety and Pollution 
Prevention, 1978, in Resolution 15 and as may be revised by the 
Organization. 

3. An inert gas system shall be provided in every cargo tank and 
slop tank in accordance with the appropriate Regulations of 
Chapter II-2 of the International Convention for the Safety of 
Life at Sea, 1974, as modified and added to by the Protocol of 
1978 Relating to the International Convention for the Safety of 
Life at Sea, 1974. 

4. With respect to the ballasting of cargo tanks, sufficient 
cargo tanks shall be crude oil washed prior to each ballast 
voyage in order that, taking into account the tanker's trading 
pattern and expected weather conditions, ballast water is put 
only into cargo tanks which have been crude oil washed. 

5. Every oil tanker operating with crude oil washing systems 
shall be provided with: 

a) an Operations and Equipment Manual detailing the system and 
equipment and specifying an operational procedure. Such a Manual 
shall be to the satisfaction of the Administration and shall 
contain all the information set out in the Specifications 
referred to in paragraph (2) of this Regulation. If an 
alteration affecting the crude oil washing system is made, the 
Operations and Equipment Manual shall be revised accordingly; 
and 

b) a Supplement to the Oil Record Book referred to in Regulation 
20 of this Annex as set out in Supplement 2 of Appendix III of 
this Annex. The Supplement shall be permanently attached to the 
Oil Record Book. 

Regulation 13C 

EXISTING TANKERS ENGAGED IN SPECIFIC TRADES. 

1. Subject to the provisions of paragraphs (2) and (3) of this 
Regulation, Regulation 13(7) to (10) of this Annex shall not 
apply to an existing oil tanker solely engaged in specific 
trades between: 

a) ports or terminals within a State Party to the present 
Protocols; or 

b) ports or terminals of States Parties to the present Protocol, 
where: 

(i) the voyage is entirely within a Special Area as defined in 
Regulation 10(1) of this Annex; or 

(ii) the voyage is entirely within other limits designated by 
the Organization. 

2. The provisions of paragraph (1) of this Regulation shall only 
apply when the ports or terminals where cargo is loaded on such 
voyages are provided with reception facilities adequate for the 
reception and treatment of all the ballast and tank washing 
water from oil tankers using them and all the following 
conditions are complied with: 

a) subject to the exceptions provided for in Regulation 11 of 
this Annex, all ballast water, including clean ballast water, 
and tank washing residues are retained on board and transferred 
to the reception facilities and the entry in the appropriate 
Sections of the Supplement to the Oil Record Book referred to in 
paragraph (3) of this Regulation is endorsed by the competent 
Port State authority; 

b) agreement has been reached between the Administration and the 
Governments of the Port States referred to in sub-paragraph 
(1)(a) or (b) of this Regulation concerning the use of an 
existing oil tanker for a specific trade; 

c) the adequacy of the reception facilities in accordance with 
the relevant provisions of this Annex at the ports or terminals 
referred to above, 

d) The International oil pollution prevention certificate is 
endorsed to the effect that the oil tanker is solely engaged in 
such specific trade, 

3. Every oil tanker engaged in a specific trade shall be 
provided with a Supplement to the Oil Record Book referred to in 
Regulation 20 of this Annex as set out in Supplement 3 to 
Appendix III of this Annex. The Supplement shall be permanently 
attached to the Oil Record Book. 

Regulation 13D 

EXISTING OIL TANKERS HAVING SPECIAL BALLAST ARRANGEMENTS 

1. Where an existing oil tanker is so constructed or operates in 
such a manner that it complies at all times with the draught and 
trim requirements set out in Regulation 13(2) of this Annex 
without recourse to the use of ballast water, it shall be deemed 
to comply with the segregated ballast tank requirements referred 
to in Regulation 13(7) of this Annex, provided that all of the 
following conditions are complied with: 

a) operational procedures and ballast arrangements are approved 
by the Administration; 

b) agreement is reached between the Administration and the 
Governments of the Port States Parties to the present Protocol 
concerned when the draught and trim requirements are achieved 
through an operational procedure; and 

c) the International Oil Pollution Prevention Certificate is 
endorsed to the effect that the oil tanker is operating with 
special ballast arrangements. 

2. In no case shall ballast water be carried in oil tanks except 
on those rare voyages when weather conditions are so severe 
that, in the opinion of the master, it is necessary to carry 
additional ballast water in cargo tanks for the safety of the 
ship. Such additional ballast water shall be processed and 
discharged in compliance with Regulation 9 of this Annex 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. 

3. An Administration which has endorsed a Certificate in 
accordance with sub-paragraph (1)(c) of this Regulation shall 
communicate to the Organization the particulars thereof for 
circulation to the Parties to the present Protocol. 

Regulation 13E 

PROTECTIVE LOCATION OF SEGREGATED BALLAST SPACES 

1. In every new crude oil tanker of 20,000 tons deadweight and 
above and every new product carrier of 30,000 tons deadweight 
and above, the segregated ballast tanks required to provide the 
capacity to comply with the requirements of Regulation 13 of 
this Annex which are located within the cargo tank length, shall 
be arranged in accordance with the requirements of paragraphs 
(2), (3) and (4) of this Regulation to provide a measure of 
protection against oil outflow in the event of grounding or 
collision. 

2. Segregated ballast tanks and spaces other than oil tanks 
within the cargo tank length (Lt) shall be so arranged as to 
comply with the following requirement: 

* 

PAc + PAs J[LT + 2D)] 

where: 

PAc = the side shell area in square metres for each segregated 
ballast tank or space other than an oil tank based on projected 
moulded dimensions, 

PAs = the bottom shell area in square metres for each such tank 
or space based on projected moulded dimensions, 

Lt = length in metres between the forward and after extremities 
of the cargo tanks, 

B = maximum breadth of the ship in metres as defined in 
Regulation 1(21) of this Annex, 

D = moulded depth in metres measured vertically from the top of 
the keel to the top of the freeboard deck beam at side 
amidships. In ships having rounded gunwales, the moulded depth 
shall be measured to the point of intersection of the moulded 
lines of the deck and side shell plating, the lines extending as 
though the gunwale were of angular design, 

J = 0.45 for oil tankers of 20,000 tons deadweight 0.03 for oil 
tankers of 200,000 tons deadweight and above, subject to the 
provisions of paragraph (3) of this Regulation. 

For intermediate values of deadweight the value of J shall be 
determined by linear interpolation. 

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

3. For tankers of 200,000 tons deadweight and above the value of 
J may be reduced as follows: 

J reduced = [J - (a - Oc + Os)] or 0.24 Oa (?) whichever is 
greater where: 

a = 0.25 for oil tankers of 200,000 tons deadweight 

a = 0.40 for oil tankers of 300,000 tons deadweight 

a = 0.50 for oil tankers of 420,000 tons deadweight and above, 

For intermediate values of deadweight the a shall be determined 
by linear interpolation. 

Oc = as defined in Regulation 23(1)(a) of this Annex, 

Os = as defined in Regulation 23(1)(b) of this Annex, 

Oa = the allowable oil outflow as required by Regulation 24(2) 
of this Annex. 

4. In the determination of PAc and PAs for segregated ballast 
tanks and spaces and other than oil tanks the following shall 
apply: 

a) the minimum width of each wing tank or space either of which 
extends for the full depth of the ship's side or from the deck 
to the top of the double bottom shall be not less than 2 metres. 
The width shall be measured inboard from the ship's side at 
right angles to the centre line. Where a lesser width is 
provided the wing tank or space shall not be taken into account 
when calculating the protecting area PAc; and 

b) the minimum vertical depth of each double bottom tank or 
space shall be B/15 or 2 metres, whichever is the lesser. Where 
a lesser depth is provided the bottom tank or space shall not be 
taken into account when calculating the protecting area PAs. 

The minimum width and depth of wing tanks and double bottom 
tanks shall be measured clear of the bilge area and, in the case 
of minimum width, shall be measured clear of any rounded gunwale 
area. 

Regulation 14 

No change 

Regulation 15 

In the existing text of this Regulation, delete reference to 
"(1973)" in relation to the International Oil Pollution 
Prevention Certificate. 

Regulation 16 and 17 

No change 

Regulation 18 

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS 

Paragraphs (1) to (4) _ No change 

The following paragraphs are added to the existing text: 

5. Every new oil tanker required to be provided with segregated 
ballast tanks, or fitted with a crude oil washing system shall 
comply with the following requirements: 

a) it shall be equipped with oil piping so designed and 
installed such that oil retention in the lines is minimized; and 

b) means shall be provided to drain all cargo pumps and all oil 
lines at the completion of cargo discharge, where necessary by 
connexion to a striping device. The line and pump drainings 
shall be capable of being discharged both ashore and to a cargo 
tank or a slop tank. For discharge ashore a special small 
diameter line shall be provided for that purpose and connected 
outboard of the ship's manifold valves. 

6. Every existing crude carrier required to be provided with 
segregated ballast tanks, or fitted with a crude oil washing 
system or operated with dedicated clean ballast tanks, shall 
comply with the provisions of paragraph (5)(b) of this 
Regulation. 

Regulation 19 

No change 

Regulation 20 

In the existing text of this Regulation, delete reference to 
"(1973)" in relation to the International Oil Pollution 
Prevention Certificate. 

Regulation 21 to 25 

No change 

APPENDIX I: LIST OF OILS 

No change 

APPENDIX II: FORM OF CERTIFICATE 

The existing form of Certificate is replaced by the following 
form: 

omissis 

APPENDIX III: FORM OF OIL RECORD BOOK 

The following forms of Supplements to the Oil Record Book are 
added to the existing form: 

omissis