22 U.S.C. § 2521a: Nonpartisan appointments

In carrying out this chapter, no political test or political qualification may be used in—(1) selecting any person for enrollment as a volunteer or for appointment to a position at, or for assignment to (or for employment for assignment to), a duty station located abroad, or (2) promoting or taking any other action with respect to any volunteer or any person assigned to such a duty station.