The Commissioner of Indian Affairs is authorized to send a special Indian Agent, or other representative of his office, to visit any Indian tribe for the purpose of negotiating and entering into a written agreement with such tribe for the commutation of the perpetual annuities due under treaty stipulations, to be subject to the approval of Congress; and the Commissioner of Indian Affairs shall transmit to Congress said agreements with such recommendations as he may deem proper.
25 U.S. Code § 12. Agent to negotiate commutation of annuities
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.