As lands or interests in lands are designated from time to time under sections 833 to 833p of this title, the Secretary of the Interior shall determine the amount of money to be paid to the Indians as just and equitable compensation therefor. The amounts due the tribe and the individual allottees or their heirs or devisees shall be paid from funds now or hereafter made available to the Department of the Interior for the Fort Peck project to the superintendent of the appropriate Indian agency, or such other officer as may be designated by the Secretary of the Interior, for credit on the books of such agency to the accounts of the tribe and the individuals concerned.l