36 C.F.R. § 271.3 Public service use.
Title 36 - Parks, Forests, and Public Property
The Chief may authorize the use of Smokey Bear for non-commercial educational purposes, without charge, when such use is essentially as a public service, and will, in his judgment, contribute to public information and education concerning the prevention of forest fires.
Title 36: Parks, Forests, and Public Property
PART 271—USE OF “SMOKEY BEAR” SYMBOL
§ 271.3 Public service use.

