43 CFR § 423.44
Controlled substances
June 11, 2020
You must not possess, consume, deliver, or be under the influence of, controlled substances included in schedules I, II, III, IV, or V of part B of the Controlled Substance Act (21 U.S.C. 812) on Reclamation facilities, lands, or waterbodies, unless the controlled substance was legally obtained through a valid prescription or order.