Regulations for the Prevention of Pollution from Ships and for Dangerous Chemicals

86 A Category Z noxious liquid substance may be discharged from an NLS ship into Section II waters or from a Canadian ship referred to in paragraph 81(b) that is an NLS ship if

• (a) the discharge is made in accordance with the ship’s discharge procedures and arrangements manual;

• (b) the ship is en route at a speed of at least 7 knots, in the case of a self-propelled ship, or at least 4 knots, in the case of a non-self-propelled ship;

• (c) in the case of a ship constructed on or after January 1, 2007, the discharge is made below the waterline through an underwater discharge outlet at a rate not exceeding the maximum rate for which the underwater discharge outlet was designed;

• (d) the discharge is made at a distance of at least 12 nautical miles from the nearest land; and

• (e) the discharge is made into waters whose depth is at least 25 m.