(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.