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: for an oil tanker, except as provided for in subparagraph (b) of this paragraph: the tanker is not within a special area; the tanker is more than 50 nautical miles from the nearest land; the tanker is proceeding en route; the instantaneous rate of discharge of oil content does not exceed 30 litres per nautical mile; the total quantity of oil discharged into the sea does not exceed for existing tankers 1/15000 of the total quantity of the particular cargo of which the residue formed a part, and for new tankers 1/30000 of the total quantity of the particular cargo of which the residue formed a part; and the tanker has in operation an oil discharge monitoring and control system and a slop tank arrangement as required by Regulation 15 of this Annex. 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: the ship is not within a special area; the ship is proceeding en route; the oil content of the effluent without dilution does not exceed 15 parts per million; and the ship has in operation (monitoring, control and filtering equipment) as required by regulation 16 of this Annex.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.