(a) All liquefied petroleum gases must 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.
(b) [Reserved]
source: CGFR 68-82, 33 FR 18878, Dec. 18, 1968, unless otherwise noted.
cite as: 46 CFR 58.16-25