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.
[Apr. 30, 1908, ch. 153], [35 Stat. 73].)