(16) Every tanker of Class VII(T) of 500 tons or over shall be provided with a fixed deck foam system complying with the requirements of Schedule 7 in Merchant Shipping Notice MSN 1666, except that this requirement shall not apply to chemical tankers or gas carriers. For these vessels alternative arrangements shall be provided to the satisfaction of the Secretary of State.
(17) Where a liquid cargo (other than one referred to in paragraph (1)) presenting a particular fire hazard is to be carried a means or system of fire-extinguishing appropriate for dealing with this hazard shall be provided to the satisfaction of the Secretary of State.