Regulation 18 Oil-like substances
Notwithstanding the provisions of regulations 6—13 an oil-like substance may be carried on an oil tanker and discharged in accordance with regulation 13 of the Prevention of Oil Pollution Regulations provided that:
the ship complies with the requirements of those regulations applicable to product carriers as therein defined (oil tankers engaged in the trade of carrying oil other than crude oil); and
where the substance in question is a Category C substance and the ship was constructed on or after 1st July 1986, it complies with the damage stability requirements for a Type 3 ship specified in the IBC Code; or
where the substance in question is a Category C substance and the ship is
a ship for which the building contract was placed on or after 2nd November 1973 and which is engaged wholly or partly on voyages to ports or terminals under the jurisdiction of states parties to MARPOL 1973/78 other than the state in which the ship is registered, or
a United Kingdom ship constructed on or after 1st July 1983 engaged solely on voyages between ports or terminals in the United Kingdom, the Channel Islands and the Isle of Man,
it complies with the damage stability requirements for a Type 3 ship specified in the BCH Code; and
the oil content meter in the ship’s oil discharge and monitoring system required by regulation 15(3) of the Prevention of Oil Pollution Regulations is approved by the Secretary of State, or by or on behalf of the government of the state in which the ship is registered, for use in monitoring the concentration of the substance in question; and
the ship carries an IOPP Certificate or a UKOPP Certificate, in either case with the supplement thereto entitled “Record of Construction and Equipment for Oil Tankers”; and
the IOPP Certificate or the UKOPP Certificate as the case may be is endorsed by the Secretary of State, or by or on behalf of the government of the state in which the ship is registered, to indicate that the ship may carry oil-like substances in conformity with Regulation 14 of Annex II to MARPOL 1973/78 and the list in such endorsement of the oil-like substances which the ship is permitted to carry includes the substance in question.