5 CFR 315.901 : Administrative Personnel (§ 1.1 To Parts 10003-10049) — (§ 1.1 To Parts 631-699) — Office Of Personnel Management (§ 1.1 To Parts 631-699) — Civil Service Regulations (§ 110.101 To Parts 631-699) — Career And Career-Conditional Employment (Subpart A To § 315.909) — Probation On Initial Appointment To A Supervisory Or Managerial Position (§ 315.901 To § 315.909) — Statutory requirement.

5 U.S.C. 3321 provides for “a period of probation . . . before initial appointment as a supervisor or manager becomes final.” It also says that a supervisor or manager “who does not satisfactorily complete the probationary period . . . shall be returned to a position of no lower grade and pay than the position from which the individual was transferred, assigned or promoted.” This subpart contains OPM regulations implementing those requirements of law.