; and (6) the manufacturer complies with requirements imposed by the Secretary for purposes of administering the program, including with respect to the duties described in section 1196. (b) Agreement in effect until drug is no longer a selected drug An agreement entered into under this section shall be effective, with respect to a drug, until such drug is no longer considered a selected drug under section 1192(c). (c) Special rule for certain selected drugs without AIM price (1) In general In the case of a selected drug for which there is no AIM price available with respect to the initial price applicability year for such drug and for which an AIM price becomes available beginning with respect to a subsequent plan year during the price applicability period for such drug, if the Secretary determines that the amount described in paragraph (2)(A) for such drug is greater than the amount described in paragraph (2)(B) for such drug, then by not later than one year after the date of such determination, the manufacturer of such selected drug shall pay to the Treasury an amount equal to the difference between such amount described in paragraph (2)(A) for such drug and such amount described in paragraph (2)(B) for such drug. (2) Amounts described (A) Weighted average price before AIM price available For purposes of paragraph (1), the amount described in this subparagraph for a selected drug described in such paragraph, is the amount equal to the weighted average manufacturer price for such dosage strength and form for the drug during the period beginning with the first plan year for which the drug is included on the list of negotiation-eligible drugs published under section 1192(d) and ending with the last plan year during the price applicability period for such drug with respect to which there is no AIM price available for such drug. (B) Amount multiplier after AIM price available For purposes of paragraph (1), the amount described in this subparagraph for a selected drug described in such paragraph, is the amount equal