36 CFR 2.21 : Parks, Forests, And Public Property (§ 1.1 To Parts 1601-1699) — (§ 1.1 To Parts 80-199) — National Park Service, Department Of The Interior (§ 1.1 To Parts 80-199) — Resource Protection, Public Use And Recreation (§ 2.1 To § 2.62) — Smoking.