Hong Kong Regulations

MERCHANT SHIPPING (CONTROL OF POLLUTION BY NOXIOUS LIQUID SUBSTANCES IN BULK) REGULATIONS - 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 1
               cubic metre or 1/3000 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. (Enacted 1987)