Subject to valid existing rights, all Federal lands within the park are hereby withdrawn from all forms of entry, appropriation, or disposal under the public land laws, from location, entry, or patent under the United States mining laws, and from disposition under all laws relating to mineral and geothermal leasing, and mineral materials, and all amendments thereto.
16 U.S. Code § 410zz–2 - Expansion of boundaries
 So in original. Probably should be “detrimental”.
2020—Subsec. (a). Pub. L. 116–260, § 201(b)(1), designated existing provisions as par. (1) and added par. (2).
Subsec. (b)(2), (3). Pub. L. 116–260, § 201(b)(2), added pars. (2) and (3) and struck out former par. (2) which read as follows: “Lands or interests therein owned by the State of Arizona or a political subdivision thereof may only be acquired by donation or exchange.”