46 C.F.R. § 181.120 Equipment installed but not required.
Title 46 - Shipping
Fire extinguishing and detecting equipment installed on a vessel in excess of the requirements of §§181.400 and 181.500 must be designed, constructed, installed and maintained in accordance with a recognized industry standard acceptable to the Commandant.
Title 46: Shipping
PART 181—FIRE PROTECTION EQUIPMENT
Subpart A—General Provisions
§ 181.120 Equipment installed but not required.
