36 C.F.R. § 504.6
Gambling
Participating in games for money or other personal property or the operation of gambling devices, the conduct of a lottery or pool, or the selling or purchasing of numbers tickets in or on the premises is prohibited.
Participating in games for money or other personal property or the operation of gambling devices, the conduct of a lottery or pool, or the selling or purchasing of numbers tickets in or on the premises is prohibited.