This bill proposes to expand the authority for federally recognized Indian Tribes to lease their trust lands for extended periods. It specifically amends subsection (a) of the first section of the Act of August 9, 1955 (25 U.S.C. 415(a)), which governs the leasing of Indian lands. The amendment inserts language to explicitly grant 99-year leasing authority to all Indian Tribes included on the list published by the Secretary of the Interior under the Federally Recognized Indian Tribe List Act of 1994. This change broadens the scope of long-term leasing, which was previously limited to specific tribes or circumstances, thereby offering greater flexibility for economic development and resource management on tribal trust lands.