Section 9(2)(k) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(k)Every ship for the time being regularly engaged voyages in the Tropics or the Persian Gulf shall be provided with awnings which will cover:(i)all exposed decks and house-tops situated immediately above any part of the crew accommodation :(ii)all exposed sides of galleys situated on an open deck;(iii)such portion of the deck spaces provided for the recreation of the crew in compliance with sub-rule (6) of rule 21 as will provide a shaded area adequate in extent having regard to the number of persons in the crew and to any shade provided for such spaces by overhanging decks.