16 U.S.C. § 273b: Grazing privileges; right of occupancy or use for fixed term of years; renewal

Where any Federal lands included within the park are legally occupied or utilized on December 18, 1971 , for grazing purposes, pursuant to a lease, permit, or license for a fixed term of years issued or authorized by any department, establishment, or agency of the United States, the Secretary of the Interior shall permit the persons holding such grazing privileges or their heirs to continue in the exercise thereof during the term of the lease, permit, or license, and one period of renewal thereafter. Grazing will be based on active preference that exists on the date of this Act [ Sept. 27, 1988 ] and no increase in animal unit months will be allowed on Park lands. No physical improvements for stock use will be established on National Park Service lands without the written concurrence of the Park Superintendent. Nothing in this section shall apply to any lease, permit, or license for mining purposes or for public accommodations and services or to any occupancy or utilization of lands for purely temporary purposes. Nothing contained in this Act [see Tables for classification] shall be construed as creating any vested right, title interest, or estate in or to any Federal lands. The provisions of Public Law 97–341 [formerly set out as a note below] are hereby repealed. Grazing will be managed to encourage the protection of the Park’s natural and cultural resources values.”