Ventilation of tanks, cofferdams, etc

(1) Subject to the provisions of regulations 40(1) and 41, all tanks carrying cargo, cofferdams and other enclosed spaces in all ships shall be provided with effective means for ventilation and access to the satisfaction of the Administration, having regard to the intended services. (2) In tankers and barges carrying flammable liquid cargo in bulk, other than crude oil or petroleum products of low flashpoint, there shall be provided for ventilation of cargo tanks a venting system consisting of one or more pressure vacuum valves at the outlets to the atmosphere or air pipes the open ends of which are fitted with removable wire mesh diaphragms of in corrodible material. Such venting systems shall be to the satisfaction of the Administration.