5 CFR § 2.4
Probationary period
November 4, 2020
Persons selected from registers of eligibles for career or career-conditional appointment and employees promoted, transferred, or otherwise assigned, for the first time, to supervisory or managerial positions shall be required to serve a probationary period under terms and conditions prescribed by the Office.
[45 FR 4337, Jan. 22, 1980]