Revenues collected after August 7, 1946, from power operations on each Indian irrigation project and deposited into the Treasury for credit to miscellaneous receipts pursuant to section 4 of the Permanent Appropriation Repeal Act, 1934 (
48 Stat. 1227), or pursuant to other provisions of law, are authorized to be appropriated annually, in specific or in indefinite amounts, equal to the collections so credited, for the following purposes in connection with the respective projects from which such revenues are derived: