; retroactive implementation Not later than 60 days after the date of enactment of this Act, the Secretary shall— (A) complete a rulemaking establishing the discounted rates required under paragraph (1); and (B) implement those discounted rates to apply retroactively to the date of enactment of this Act. (c) Effectiveness The Secretary— (1) shall carry out subsection (b) until the funds appropriated under subsection (d) are expended; and (2) may carry out subsection (b) after those funds are expended only to the extent and in the amount provided in advance in appropriations Acts. (d) Funding There is appropriated to the Secretary, out of funds in the Treasury not otherwise appropriated, $58,000,000, to remain available until expended, to carry out subsection (b).