; and (D) not be available for participation by an individual who is not a Postal Service employee or Postal Service annuitant (except as a family member of such an employee or annuitant or as provided under paragraph (5)). (2) Separate Postal Service risk pool The Office shall ensure that each Program plan includes rates that reasonably and equitably reflect the cost of benefits provided to a risk pool consisting solely of Postal Service employees and Postal Service annuitants (and covered family members of such employees and annuitants), taking into specific account the reduction in benefits cost for the Program plan due to the Medicare enrollment requirements under subsection (e) and any savings or subsidies resulting from subsection (f)(1). (3) Actuarially equivalent coverage The Office shall ensure that each carrier participating in the Postal Service Health Benefits Program provides coverage under the Program plans offered by the carrier that is actuarially equivalent, as determined by the Office, to the coverage that the carrier provides under the health benefits plans offered by the carrier under this chapter that are not Program plans. (4) Applicability of Federal Employees Health Benefits Program requirements Except as otherwise set forth in this section, all provisions of this chapter applicable to health benefits plans offered by the carrier under section 8903 or 8903a shall also apply to plans offered under the Program. (5) Application of continuation coverage In accordance with rules established by the Office, section 8905a shall apply to health benefits plans offered under this section in the same manner as such section applies to other health benefits plans offered under this chapter. (d) Election of coverage (1) In general Except as provided in paragraphs (2) and (3), each Postal Service employee and Postal Service annuitant who elects to receive health benefits coverage under this chapter— (A) shall be subject to the requirements of this section