5 C.F.R. § 837.203 Annuities that are suspended during reemployment.
Title 5 - Administrative Personnel
(a) All annuitants. Payment of annuity is suspended when— (1) The annuitant is appointed as a justice or judge of the United States, as defined by section 451 of title 28, United States Code; or (2) The annuitant receives an interim appointment under §772.102 of this chapter. (b) CSRS annuitants only. Payment of annuity is suspended when the annuitant is a retired Member and becomes employed in an elective position, or is appointed to a position that is not intermittent or without pay.
Title 5: Administrative Personnel
PART 837—REEMPLOYMENT OF ANNUITANTS
Subpart B—Annuitant and Employee Status
§ 837.203 Annuities that are suspended during reemployment.