notice to the Secretary. (C) Effectiveness of termination Any termination under this paragraph shall not affect rebates due under the agreement under this section before the effective date of its termination. (D) Delay before reentry In the case of any agreement under this section with a manufacturer which is terminated in a plan year, another such agreement with the manufacturer (or a successor manufacturer) may not be entered into before the subsequent plan year, unless the Secretary finds good cause for an earlier reinstatement of such an agreement. (3) Information For purposes of carrying out this section, the Secretary shall use information submitted by manufacturers under section 1927(b)(3). (c) Rebate amount (1) In general For purposes of this section, the amount specified in this subsection for a dosage form and strength with respect to a part D rebatable drug and applicable year is, subject to subparagraphs (B) and (C) of paragraph (3), the amount equal to the product of— (A) the total average number of units weighted by, and dispensed for, such dosage form and strength with respect to such part D rebatable drug and year