Section 28(3)(c) in The Merchant Shipping (Prevention of Pollution by Oil from Ships) Rules, 2010
(c)the stability in the final stage of flooding shall be investigated and may be regarded as sufficient if the righting lever curve has at least a range of 20º beyond the position of equilibrium in association with a maximum residual righting lever of at least 0.1 m within the 25º range and the area under the curve within this range shall not be less than 0.0175 m.rad.: