; and (B) where practicable, to partner with countries that are allies or partners of the United States to meet those needs and schedules until that time. (f) Nuclear Fuel Security Program (1) In general In carrying out the Nuclear Fuel Security Program, the Secretary— (A) shall— (i) if determined to be necessary or appropriate based on the completion of a market evaluation, not later than 90 days after the date of enactment of this Act, take actions, including cost-shared financial agreements, milestone-based payments, or other mechanisms, to support commercial availability of LEU and to promote diversity of supply in domestic uranium mining, conversion, enrichment, and deconversion capacity and technologies, including new capacity, among U.S. nuclear energy companies; (ii) not later than 180 days after the date of enactment of this Act, enter into 2 or more contracts with members of the consortium to begin acquiring not less than 20 metric tons per year of HALEU by December 31, 2027 (or the earliest operationally feasible date thereafter), from U.S. nuclear energy companies; (iii) utilize only uranium produced, converted, enriched, deconverted, and reduced in— (I) the United States; or (II) if domestic options are not practicable, a country that is an ally or partner of the United States; and (iv) to the maximum extent practicable, ensure that the use of domestic uranium utilized as a result of that program does not negatively affect the economic operation of nuclear reactors in the United States; and (B) (i) may not make commitments under this subsection (including cooperative agreements (used in accordance with section 6305 of title 31, United States Code), purchase agreements, guarantees, leases, service contracts, or any other type of commitment) for the purchase or other acquisition of HALEU or LEU unless— (I) funds are specifically provided for those purposes in advance in appropriations Acts enacted after the date of enactment of this Act