25 U.S. Code § 121 - Payment of share of tribal funds to helpless Indians
The pro rata share of any Indian who is mentally or physically incapable of managing his or her own affairs may be withdrawn from the Treasury in the discretion of the Secretary of the Interior and expended for the benefit of such Indian under such rules, regulations, and conditions as the said Secretary may prescribe:
For transfer of functions of other officers, employees, and agencies of Department of the Interior, with certain exceptions, to Secretary of the Interior, with power to delegate, see Reorg. Plan No. 3 of 1950, §§ 1, 2, eff. May 24, 1950, 15 F.R. 3174,64 Stat. 1262, set out in the Appendix to Title 5, Government Organization and Employees.