(a)
(1) An employee serving in a competitive position under a career or career-conditional appointment;
(2) An employee serving under a career appointment in the Senior Executive Service (SES); or
(3) A nontemporary excepted employee.
(b)
(1) An employee who is serving a probationary or trial period under an appointment to a position in the excepted or competitive service or the SES.
(2) An employee serving in an obligated position;
(3) An employee serving with reemployment rights granted under this subpart;
(4) An employee who has received a notice of involuntary separation because of reduction in force or otherwise; or
(5) An employee who has already submitted a resignation.