Section 108.491 - General(a) Each portable and semi-portable fire extinguisher on a unit must be approved under subpart 162.028 or 162.039 of this chapter.(b) Vessels contracted for prior to August 22, 2016 must meet the following requirements: (1) Previously installed extinguishers with extinguishing capacities smaller than what is required in Table 108.495 of this subpart need not be replaced and may be continued in service so long as they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection.(2) All new equipment and installations must meet the applicable requirements in this subpart for new vessels.USCG-2012-0196, 81 FR 48266 , July 22, 2016