Public Law 80–51

That whoever, without lawful authority or permission, shall go upon any national-forest land while it is closed to the public by or under authority of a regulation of the Secretary of Agriculture made pursuant to law shall be fined not more than $500, or imprisoned without hard labor not more than six months, or both: Provided, That nothing herein shall be construed to limit the authority of the Secretary of Agriculture under other law to otherwise provide for regulating the occupancy and use of national forest lands and lands administered by the Forest Service.