D.C. Mun. Regs. tit. 6-C, § 226
226.1 Except when the appointment is affected with a break in service of three (3) days or more, or as otherwise specified in this chapter, an employee who once satisfactorily completed a probationary period in the Career Service shall not be required to serve another probationary period.
226.2 An employee who once satisfactorily completed a probationary period in the Career Service shall be required to serve another probationary period when the employee:
(a) Is appointed through open competition to a position with a different educational requirement; or
(b) Is appointed through open competition to a position with different licensure, certification, or other similar requirements.
SOURCE: Final Rulemaking published at 69 DCR 004169 (April 29, 2022).