[Code of Federal Regulations] [Title 46, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR58.16-25] [Page 263] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 58_MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS--Table of Contents Subpart 58.16_Liquefied Petroleum Gases for Cooking and Heating Sec. 58.16-25 Odorization. (a) All liquefied petroleum gases shall be effectively odorized by an agent of such character as to indicate positively by a distinctive odor, the presence of gas down to concentration in air of not over one- fifth the lower limit of combustibility.