25 U.S. Code § 682 - Payment free of liens or claims
No money paid to Indians under sections 681 to 683 of this title shall be subject to any lien or claim of attorneys or other persons. Before any payment is made under said sections, the Red Lake Band of Chippewa Indians of Minnesota shall, in such manner as may be prescribed by the Secretary of the Interior, ratify and accept the provisions of said sections.
Source(June 19, 1952, ch. 445, § 2,66 Stat. 139.)