Any other election may be effected in such form as the Director prescribes under § 850.104 . Such elections include but are not limited to elections of coverage under CSRS, FERS, FEGLI, FEHB, or RFEHB by individuals entitled to elect such coverage; applications for service credit and applications to make deposit; and elections regarding the withholding of State income tax from annuity payments.
5 C.F.R. §850.203