5 CFR § 850.203
Other elections
November 4, 2020
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.
[78 FR 68983, Nov. 18, 2013]