5 CFR §315.502

1. (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.
2. (b)Exceptions.
   1. (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. (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.