5 CFR § 731.105 - Authority to take suitability actions.
(a) Neither OPM nor an agency acting under delegated authority may take a suitability action in connection with any application for, or appointment to, a position that is not subject to investigation or check under § 731.104.
(e) An agency may not take a suitability action against an employee. Nothing in this part precludes an agency from taking an adverse action against an employee under the procedures and standards of part 752 of this chapter or terminating a probationary employee under the procedures of part 315 or part 359 of this chapter. An agency must notify OPM to the extent required in § 731.103(g) if it wants to take, or has taken, action under these authorities.