46 CFR 97.37-23 - Hand portable fire extinguishers.
(a) Each hand portable fire extinguisher shall be marked with a number and the location where stowed shall be marked with a corresponding number at least 1/2 inch high. Where only one type and size of hand portable fire extinguisher is carried, the numbering may be omitted.
Title 46 published on 2013-10-01
no entries appear in the Federal Register after this date.