46 CFR 169.737 - Hand portable fire extinguishers.
Each hand portable fire extinguisher must be marked with a number, and the location where it is stowed must be marked with a corresponding number. The marks must be 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 2014-10-01
no entries appear in the Federal Register after this date.