# The Merchant Shipping (Control of Pollution by Noxious Liquid Substances in Bulk) Regulations 1987, Regulation 13: Category D residual mixtures—discharge


The discharge into the sea of a Category D residual mixture is prohibited except where—
(a) (i) the ship is proceeding on its way 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 ship which is not self-propelled;
(ii) the concentration of the substance in the effluent is not greater than one part of the substance to ten parts of water; and
(iii) the discharge is made at a distance of not less than 12 nautical miles from the nearest land; or
(b) the discharge is made in accordance with regulation 11 as it applies to Category C residual mixtures.

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Source: https://www.legislation.gov.uk/uksi/1987/551/regulation/13 (the official version)
Page: https://openlegislation.uk/merchant-shipping-control-of-pollution-by-noxious-liquid-substances-in-bulk-regulations-1987/regulation-13
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.