The Secretary of the Interior may, upon petition by any tribe, issue a charter of incorporation to such tribe: Provided, That such charter shall not become operative until ratified by the governing body of such tribe. Such charter may convey to the incorporated tribe the power to purchase, take by gift, or bequest, or otherwise, own, hold, manage, operate, and dispose of property of every description, real and personal, including the power to purchase restricted Indian lands and to issue in exchange therefor interests in corporate property, and such further powers as may be incidental to the conduct of corporate business, not inconsistent with law; but no authority shall be granted to sell, mortgage, or lease for a period exceeding twenty-five years any trust or restricted lands included in the limits of the reservation. Any charter so issued shall not be revoked or surrendered except by Act of Congress . (June 18, 1934, ch. 576, § 17, 48 Stat. 988 ; Pub. L. 101–301, § 3(c) , May 24, 1990 , 104 Stat. 207 .) Editorial Notes Codification Section was formerly classified to section 477 of this title prior to editorial reclassification and renumbering as this section. Amendments 1990— Pub. L. 101–301 substituted “by any tribe” for “by at least one-third of the adult Indians”, “by the governing body of such tribe” for “at a special election by a majority vote of the adult Indians living on the reservation”, and “twenty-five years any trust or restricted lands” for “ten years any of the land”.