Section 31(7)(b) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(b)In every ship-(i)which does not attract the provisions of rule 12A;(ii)the keel of which was laid or which was at a similar stage of construction on the 1st day of January, 1967; and(iii)which is intended to be employed, whether permanent or temporarily, on voyages to, from or within Persian Gulf area--