Section 8(1)(b) in The Merchant Shipping (Control of Pollution by Noxious Liquid Substances in Bulk) Rules, 2010
(b)a renewal survey shall be conducted at an interval not exceeding five years except where the provisions of sub-rules (2), (5), (6) or (7) of rule 10 are applicable and the renewal survey shall be such as to ensure that the structure, equipment, systems, fittings, arrangements and materials fully comply with the requirements of these rules.