; and (ii) the ratio of— (I) the total number of units of such package size dispensed on July 1, 2019; to (II) the total number of units of such dosage form and strength dispensed on July 1, 2019. (4) Benchmark CPI–U The term benchmark CPI–U means the consumer price index for all urban consumers (United States city average) for July 2019. (5) Rebate period CPI–U The term rebate period CPI–U means, with respect to a rebate period, the consumer price index for all urban consumers (United States city average) for the last month of the rebate period. (6) Annual reconciliation of rebate amount The Secretary shall, on an annual basis, conduct a one-time reconciliation of the rebate amounts owed by a manufacturer under this section based on any changes submitted by a PDP sponsor of a prescription drug plan or an MA organization offering an MA–PD plan to the number of units of a rebatable covered part D drug dispensed during the preceding year. Such reconciliation shall be completed not later than 6 months after the date by which the Secretary reconciles payment for covered part D drugs with PDP sponsors of prescription drug plans or MA organizations offering MA–PD plans. (c) Treatment of subsequently approved drugs Subject to subsection (e)(2), in the case of a rebatable covered part D drug first approved or licensed by the Food and Drug Administration after July 1, 2019— (1) subparagraph (A)(ii) of subsection (b)(3) shall be applied as if the term benchmark CPI–U were defined under subsection (b)(4) as if the reference to July 2019 under such subsection were a reference to the first month after the last day of the six month period that begins on the day on which the drug was first marketed ; and (2) subsection (b)(3) shall be applied by substituting, for the benchmark unit-weighted price otherwise determined under subparagraph (B) of such subsection, the benchmark unit-weighted average price determined under paragraph (3) for the rebate period