S.L. 234.55 Art. 9Ballast Water exchange.

(1) A ship required to meet the standard of regulation

D-1 of the Convention shall perform Ballast Water exchange with an efficiency of at least 95 percent volumetric exchange of Ballast Water.

(2) A ship exchanging Ballast Water by the pumping-through method, pumping through three times the volume of each Ballast Water tank shall be considered to meet the standard described in sub-regulation (1). Pumping through less than three times the volume may be accepted provided the ship can demonstrate that at least 95 percent volumetric exchange is met.

(3) A ship conducting Ballast Water exchange to meet the standard in regulation D-1 of the Convention shall comply with the requirements of Regulation B-4 of the Convention.