[Code of Federal Regulations] [Title 46, Volume 7] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR196.37-23] [Page 407] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 196_OPERATIONS--Table of Contents Subpart 196.37_Markings for Fire and Emergency Equipment, etc. Sec. 196.37-23 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.