Section 1A(34)(d) in The Merchant Shipping (Prevention of Pollution by Oil from Ships) Rules, 2010
(d)which has undergone a major conversion.-(i)for which the contract is placed after the 1st June, 1979; or(ii)in the absence of a contract, the construction work of which begun after the 1st January, 1980; or(iii)which is completed after 1st June, 1982.