# The Merchant Shipping (Control of Pollution by Noxious Liquid Substances in Bulk) Regulations 1987, Regulation 10: Category C—tank washing in Special Areas


Where a Category C substance is unloaded at a port in a Special Area every tank from which such substance has been unloaded shall be pre-washed and the resulting tank washings shall be discharged to a reception facility at the port of unloading unless—
(a) unloading was carried out as required by regulation 7 or to the satisfaction of a Marpol surveyor, and
(b) either
(i) the substance is a Category C substance identified in the ship’s Procedures and Arrangements Manual as likely to result in a residue quantity from any one tank which does not exceed one cubic metre or 1/3,000th of the capacity of that tank, whichever is the greater, or
(ii) the substance is not a high residue substance and the residues are to be retained on board for discharge outside a Special Area.

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Source: https://www.legislation.gov.uk/uksi/1987/551/regulation/10 (the official version)
Page: https://openlegislation.uk/merchant-shipping-control-of-pollution-by-noxious-liquid-substances-in-bulk-regulations-1987/regulation-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.