Section 26(2) in The Merchant Shipping (Prevention of Pollution by Oil from Ships) Rules, 2010
(2)Cargo tanks of oil tankers shall be of such size and arrangements that the hypothetical outflow Oc or Os calculated in accordance with the provisions of rule 25 anywhere in the length of the ship does not exceed 30,000 cubic metres or 400 (DWT) 1/3, whichever is the greater, but subject to a maXimum of 40,000 cubic metres.
