Hong Kong Regulations

MERCHANT SHIPPING (CONTROL OF POLLUTION BY NOXIOUS LIQUID SUBSTANCES IN BULK) REGULATIONS - REGULATION 9

Category B - tank washing in Special Areas

Where a Category B 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 into 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)  the substance is not a high residue substance; and

   (c)  the residues are to be retained on board for discharge outside a
        Special Area. (Enacted 1987)