16 U.S.C. § 559b - Prevention of manufacture, etc., of marijuana and other controlled substances

(a) Purpose 
The purpose of sections 559b to 559f of this title is to authorize the Secretary of Agriculture (hereinafter in sections 559b to 559f of this title referred to as the Secretary) to take actions necessary, in connection with the administration and use of the National Forest System, to prevent the manufacture, distribution, or dispensing of marijuana and other controlled substances.

(b) Law enforcement authority 
Nothing in sections 559b to 559f of this title shall diminish in any way the law enforcement authority of the Forest Service.

(c) Definitions 
As used in sections 559b to 559f of this title, the terms manufacture, dispense, and distribute shall have the same meaning given such terms in section 802 of title 21.