5 C.F.R. § 315.502

(a) General rule. Except as provided in paragraph (b) of this section, a career employee who transfers remains a career employee and a career-conditional employee who transfers remains a career-conditional employee.

(b) Exceptions. (1) A career-conditional employee who transfers to a position required by law to be filled on a permanent basis becomes a career employee.

(2) A career employee who transfers from a position required by law to be filled on a permanent basis becomes a career-conditional employee unless he or she has completed the service requirement for career tenure.