; and (ii) the annuitant or family member shall not be deemed to have elected to be enrolled under Medicare part B as described in paragraph (3)(A)(ii). (f) Medicare coordination (1) In general The Office shall require each PSHBP plan to provide benefits for Medicare eligible individuals pursuant to the standard coordination of benefits method used under this chapter, rather than the exclusion method or the carve-out method. (2) Medicare part D prescription drug benefits The Office shall require each PSHBP plan to provide qualified prescription drug coverage for Postal Service annuitants and family members who are part D eligible individuals (as defined in section 1860D–1(a)(3)(A) of the Social Security Act ( 42 U.S.C. 1395w–101(a)(3)(A) ) under a prescription drug plan under Medicare part D pursuant to the provisions of section 1860D–22(b) (commonly referred to as an employer group waiver plan ). For purposes of the preceding sentence, the carrier offering the PSHBP plan shall be deemed to be the sponsor of the plan for purposes of Medicare part D. (g) Postal Service contribution (1) In general Subject to subsection (i), for purposes of applying section 8906(b) to the Postal Service, the weighted average shall be calculated in accordance with paragraphs (2) and (3). (2) Weighted average calculation Not later than October 1 of each year (beginning with the year before the initial contract year), the Office shall determine the weighted average of the rates established pursuant to subsection (c)(2) for PSHBP plans that will be in effect during the following contract year with respect to— (A) enrollments for self only; (B) enrollments for self plus one