Section 6(1)(b) in The Merchant Shipping (Prevention of Pollution by Oil from Ships) Rules, 2010
(b)a renewal survey at an intervals not exceeding five years, except where the provisions of clause (b) of sub-rule (2), sub-rules (5), (6) or (7) of rule 10 is applicable, and the renewal survey shall be such as to ensure that the structure, equipment; systems, fittings, arrangements and material fully comply with the requirements of these rules.