(a) Fire detecting, manual alarm, and supervised patrol systems are not required except in special cases; but if installed, the systems shall meet the applicable requirements of part 76 of subchapter H (Passenger Vessels) of this chapter.
(b) In each compartment containing explosives, and in adjacent cargo compartments, there shall be provided a smoke detecting or other suitable type fire detecting system.
(c) Enclosed spaces which are ``specially suitable for vehicles'' shall be fitted with an approved fire or smoke detecting system. [CGFR 66-33, 31 FR 15285, Dec. 6, 1966]