(A), the Secretary may, for each rebatable covered part D drug, delay the timeframe for reporting the information and rebate amount described in clauses (i), (ii), (iii), and (iv) of such subparagraph for rebate periods in 2022 until not later than December 31, 2023. (2) Manufacturer rebate (A) In general Subject to subparagraph (B), for each rebate period beginning on or after January 1, 2022, each manufacturer of a rebatable covered part D drug shall, not later than 30 days after the date of receipt from the Secretary of the information and rebate amount pursuant to paragraph (1), provide to the Secretary a rebate that is equal to the amount specified in subsection (b) for such drug for such rebate period. (B) Exemption for shortages The Secretary may reduce or waive the rebate under this paragraph with respect to a rebatable covered part D drug that is listed on the drug shortage list maintained by the Food and Drug Administration pursuant to section 506E of the Federal Food, Drug, and Cosmetic Act. (3) Request for reconsideration The Secretary shall establish procedures under which a manufacturer of a rebatable covered part D drug may request a reconsideration by the Secretary of the rebate amount specified under subsection (b) for such drug and rebate period, as reported to the manufacturer pursuant to paragraph (1). Timing for a reconsideration shall be coordinated with the timing of reconciliation, as described in subsection (b)(6) and as determined appropriate by the Secretary. (4) Definitions In this section: (A) Rebate period (i) In general Subject to clause (ii), the term rebate period means, with respect to a year, each of the six month periods that begin on January 1 and July 1 of the year. (ii) Initial rebate period for subsequently approved drugs In the case of a rebatable covered part D drug described in subsection (c), the initial rebate period for which a rebate amount is determined for such rebatable covered part D drug pursuant to such subsection shall be the period beginning with the first