5 CFR §335.101

1. (a)Status. A position change authorized by § 335.102 does not change the competitive status of an employee.
2. (b)Tenure. Except as provided in paragraph (c) of this section and § 316.703 of this chapter, a position change authorized by § 335.102 does not change the tenure of an employee.
3. (c)Exceptions.
   1. (1)A career-conditional employee who is promoted, demoted, or reassigned to a position paid under chapter 45 of title 39, United States Code, or required by law to be filled on a permanent basis becomes a career employee.
   2. (2)A career employee who is promoted, demoted, or reassigned from a position paid under chapter 45 of title 39, United States Code, or required by law to be filled on a permanent basis to a position under the career-conditional employment system becomes a career-conditional employee unless he has completed the service requirement for career tenure.