Section 33(1) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(1)In every ship to which these rules apply, being a ship regularly engaged on voyages to any port to which this rules relates, the crew accommodation, other than galleys, store rooms and recreation spaces on the open deck shall be provided with protection against the admission of mosquitoes. Such protection shall be provided by means of screens of rust proof wire or other suitable material which shall be fitted to all side scuttles, natural ventilators, skylights and doors leading to the open deck.
