# The Merchant Shipping (Control of Pollution by Noxious Liquid Substances in Bulk) Regulations 1987, Regulation 5: Category A residual mixtures—discharge


The discharge into the sea of a Category A residual mixture is prohibited except where all the following conditions are satisfied:
(a) the effluent consists solely of water added to the tank after it has been emptied in accordance with regulation 4(3) or 4(5); and
(b) the ship is proceeding 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; and
(c) the discharge is made below the water line; and
(d) the discharge is made at a distance of not less than 12 nautical miles from the nearest land and in a depth of water of not less than 25 metres.

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Source: https://www.legislation.gov.uk/uksi/1987/551/regulation/5 (the official version)
Page: https://openlegislation.uk/merchant-shipping-control-of-pollution-by-noxious-liquid-substances-in-bulk-regulations-1987/regulation-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.