Hong Kong Regulations

MERCHANT SHIPPING (CONTROL OF POLLUTION BY NOXIOUS LIQUID SUBSTANCES IN BULK) REGULATIONS - REGULATION 21

Pumping arrangements

PART IV

CONSTRUCTION AND EQUIPMENT

(1) In every ship constructed on or after 1 July 1986 the pumping and piping
arrangements serving any tank designated for the carriage of a
Category B substance or a Category C substance shall be such that, if the tank
were filled with water and pumped out under favourable pumping conditions, the
quantity of residue retained in the tank's associated piping and in the
immediate vicinity of the tank's suction point would not exceed-

   (a)  in the case of a tank designated for the carriage of a Category 
        B substance 0.1 cubic metres; or

   (b)  in the case of a tank designated for the carriage of a Category 
        C substance 0.3 cubic metres.

(2) In every ship constructed before 1 July 1986 the pumping and piping
arrangements serving any tank designated for the carriage of a
Category B substance or a Category C substance shall be such that if the tank
were filled with water and pumped out under favourable pumping conditions-

   (a)  the quantity or residue retained in the tank's associated piping and
        in the immediate vicinity of the tank's suction point would not
        exceed-

        (i)    in the case of a tank designated for the carriage of a
               Category  B substance 0.3 cubic metres; or

        (ii)   in the case of a tank designated for the carriage of a
               Category C substance 0.9 cubic metres; or

   (b)  until 2 October 1994 (on which date this sub-paragraph shall cease to
        have effect) the quantity of residue retained in the tank and its
        associated pumping system, when added to the surface residue
        assessment of the tank calculated in accordance with Appendix A to the
        IMO Standards would not exceed-

        (i)    in the case of a tank designated for the carriage of a
               Category  B substance, 1 cubic metre or 1/3000 of the capacity
               of the tank, whichever is the greater; or

        (ii)   in the case of a tank designated for the carriage of a
               Category C substance, 3 cubic metres or 1/1000 of the capacity
               of the tank, whichever is the greater.

(3) The Director may exempt from any of the requirements of this regulation
any ship which is so constructed and operated that-

   (a)  ballasting of cargo tanks is not required; and

   (b)  cargo tank washing is required only for the purposes of repair or dry
        docking, subject to such conditions as he thinks fit.

(4) An exemption granted in accordance with regulation 5A(6) or (7) of MARPOL
1973/78 by or on behalf of a state party to MARPOL 1973/78 to a ship
registered in that state shall be treated as equivalent to an exemption
granted by the Director. (Enacted 1987)