; and (F) options that combine 1 or more of the approaches described in subparagraphs (A) through (E) to meet the deadlines described in paragraph (2). (4) Limitations (A) Certain services The Secretary shall not barter or otherwise sell or transfer uranium in any form in exchange for services relating to— (i) the final disposition of radioactive waste from uranium that is the subject of a contract for sale, resale, transfer, or lease under this subsection; or (ii) environmental cleanup activities. (B) Certain commitments In carrying out activities under this subsection, the Secretary— (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; or (II) the commitment is funded entirely by funds made available to the Secretary from the account described in subsection (j)(2)(B); and (ii) may make a commitment described in clause (i) only— (I) if the full extent of the anticipated costs stemming from the commitment is recorded as an obligation at the time that the commitment is made