36 C.F.R. § 2.37 Noncommercial soliciting.
Title 36 - Parks, Forests, and Public Property
Soliciting or demanding gifts, money, goods or services is prohibited, except pursuant to the terms and conditions of a permit that has been issued under §2.50, §2.51 or §2.52.
Title 36: Parks, Forests, and Public Property
PART 2—RESOURCE PROTECTION, PUBLIC USE AND RECREATION
§ 2.37 Noncommercial soliciting.

