§ 398d.
Changes in the boundaries of reservations created by Executive order, proclamation, or otherwise for the use and occupation of Indians shall not be made except by Act of Congress.
([Mar. 3, 1927, ch. 299, § 4], [44 Stat. 1347]; [Pub. L. 94–579, title VII, § 704(a)], Oct. 21, 1976, [90 Stat. 2792].)