of Enterprise Assessments to ensure the project is in compliance with nuclear safety requirements. 304. None of the funds made available in this title may be used to approve critical decision-2 or critical decision-3 under Department of Energy Order 413.3B, or any successive departmental guidance, for construction projects where the total project cost exceeds $100,000,000, until a separate independent cost estimate has been developed for the project for that critical decision. 305. Notwithstanding section 301(c) of this Act, none of the funds made available under the heading Department of Energy—Energy Programs—Science in this or any subsequent Energy and Water Development and Related Agencies Appropriations Act for any fiscal year may be used for a multiyear contract, grant, cooperative agreement, or Other Transaction Agreement of $1,000,000 or less unless the contract, grant, cooperative agreement, or Other Transaction Agreement is funded for the full period of performance as anticipated at the time of award. 306. Uranium Lease and Take-Back Fund. There is hereby established in the Treasury of the United States a fund to be known as the Uranium Lease and Take-Back Fund (the Fund) for the costs necessary to service the lease and take-back contracts entered into by the Department of Energy pursuant to section 3173 of the National Defense Authorization Act for Fiscal Year 2013, including the costs of production and packaging of low enriched uranium for delivery and the costs of taking back target residue or spent nuclear fuel for final disposition. For initial capitalization, there is appropriated $1,000,000 to the Fund, to remain available until expended. Notwithstanding 31 U.S.C. 3302 , revenues received under section 3173 of such Act in this and subsequent fiscal years shall be credited to the Fund as discretionary offsetting collections and shall not be available until appropriated. 307. (a) Definitions In this section: (1) Affected indian tribe The term affected Indian tribe has the meaning given the term in