; commonly known as the Long-Term Leasing Act ), an Indian Tribe may lease land subject to a restriction imposed by the United States against alienation and taxation, or grant an easement or right-of-way thereon, for a period that does not exceed 99 years without review and approval by the Secretary. (b) Tribal land management Real property law enacted or established by an Indian Tribe shall— (1) preempt any provision of Federal law or regulation governing the use of such land, except as set forth in this Act; (2) be given preemptive effect only upon having been first published in the Federal Register; and (3) be published in the Federal Register by the Secretary not later than 120 days after the Secretary receives a copy of the Tribal law from the Indian Tribe. (c) Applicability of the indian gaming regulatory act Land subject to a restriction imposed by the United States against alienation and taxation acquired by an Indian Tribe under the provisions of this section shall be treated as trust lands for purposes of the Indian Gaming Regulatory Act ( 25 U.S.C. 2701 et seq.). 5. Responsibilities of the secretary relating to restricted fee tribal lands (a) Trust responsibility not diminished Nothing in this section shall be construed to diminish the Federal trust responsibility to any Indian Tribe. (b) Secretary’s trust responsibility To protect restricted fee tribal lands With respect to restricted fee status lands, the Secretary shall enforce the provisions of the Act of June 30, 1834 ( 25 U.S.C. 177 ; 4 Stat. 730), to protect the Indian Tribe’s title, ownership, tax immunity, and Indian country status of such lands.