33 CFR §149.404

1. (a)A deepwater port may use fire fighting equipment that is not Coast Guard approved as excess equipment, pursuant to § 149.403 of this subpart, if the equipment does not endanger the port or the persons aboard it in any way. This equipment must be listed and labeled by a nationally recognized testing laboratory (NRTL), as set forth in 29 CFR 1910.7, and it must be maintained in good working condition.
2. (b)Use of non-Coast Guard-approved fire detection systems may be acceptable as excess equipment provided that—
   1. (1)Components are listed by an NRTL as defined in 46 CFR 161.002-2, and are designed, installed, tested, and maintained in accordance with an appropriate industry standard and the manufacturer's specific guidance;
   2. (2)Installation conforms to the requirements of 46 CFR chapter I, subchapter J (Electrical Engineering), with specific regard to the hazardous location installation regulations in 46 CFR 111.105;
   3. (3)Coast Guard plan review is completed for wiring plans; and
   4. (4)The system and units remain functional as intended. To ensure this, marine inspectors may test and inspect the system.