80 STAT. ]
PUBLIC LAW 89-667-OCT. 15, 1966
921
who donated to the United States rights and interests in minerals in the lands within the park shall be given notice, in accordance with regulations to be prescribed by the Secretary, of their preferential right to a reconveyance, without consideration, of the respective rights and interests in minerals which they donated to the United States. Such notice shall be in a form reasonably calculated to give actual notice to those entitled to such preferential right, and shall provide for a period of not less than one hundred and eighty days within which to exercise such preferential right. The preferential right to such reconveyance shall inure to the benefit of the successors, heirs, devisees, or assigns of such persons having such preferential right to a reconveyance, and such successors, heirs, devisees, or assigns shall be given the notice provided for in this subsection. (c) Such rights and interests in minerals, including all minerals Lands withdrawn of whatever nature, in and underlying the lands within the boundaries '^°'" ®^^"^^" of the park and which are acquired by the United States under the provisions of this Act are hereby withdrawn from leasing and are hereby excluded from the application of the present or future provisions of the Mineral Leasing Act for Acquired Lands (Aug. 7, 1947, c. 513, 61 Stat. 913) or other Act in lieu thereof having the same 3o use 351 note. purpose, and the same are hereby also excluded from the provisions of all present and future laws affecting the sale of surplus property or of said mineral interests acquired pursuant to this Act by the United States or any department or agency thereof, except that, it such person having such preferential right to a reconveyance fails or refuses to exercise such preferential right to a reconveyance as provided in subparagraph (b) next above, then this subsection (c) shall not be applicable to the rights and interests in such minerals in the identical lands of such person so failing or refusing to exercise such preferential right to a reconveyance from and after the one hundred and eightyday period referred to in subparagraph (b) next above. (d) If at any time in the future an Act of Congress provides that ^^^51"^",^"^'"^^ the national welfare or an emergency requires the development and production of the minerals underlying the lands within the boundaries of the national park, or any portion thereof, and such Act of Congress, notwithstanding the provisions of subsection (c) of th's section or any other Act, authorizes the Secretary to lease said land for the purpose of drilling, mining, developing, and producing said minerals, the Secretary shall give the persons (including the State of Texas) who donated such minerals to the United States notice of their preferential right to lease, without consideration, all or any part of the respective rights and interests in minerals which they donated to the United States, subject to such terms and conditions as the Secretary may prescribe. Such preferential right shall inure to the benefit of the suc-. cessors or assigns, and of the heirs or devisees of such persons having such preferential right in the premises. The persons entitled to a preferential right under this subsection shall be given the same notice thereof as persons entitled to preferential rights under subsection (b) of this section. If such person having such preferential right fails or refuses to exercise such right within the time specified in the above notice, the Secretary may thereafter lease the minerals involved to any other person under such terms and conditions as he may prescribe. (e) If at an;^ time oil, gas, or other minerals should be discovered tn^/t "Jafj^n'^°"" and produced in commercial quantities from lands outside of the agreement. boundaries of the park, thereby causing drainage of oil, gas, or other minerals from lands within the boundaries of the park, and if the Secretary participates in a communitization agreement or takes other action to protect the rights of the United States, the proceeds, if any, derived from such agreement or action shall inure to the benefit of the
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