5 CFR 531.243: Promotion of a GM employee.

(a) Upon promotion, an employee's status as a GM employee ends, as provided in § 531.241(b).

(b) When an employee loses status as a GM employee because of a temporary promotion and is returned to the lower grade upon expiration or termination of the temporary promotion under § 531.215(c)(1), he or she will be deemed to have been placed at the lowest step rate that equals or exceeds the employee's former GS rate (as a GM employee) on the effective date of the temporary promotion, before applying any other step increases based on his or her service during the temporary promotion.

(c) A GM employee's GS rate is used as the existing rate of pay in applying the promotion rule in § 531.214. A GM employee's off-step GS rate in the grade before promotion is not converted to a GS step rate in applying the promotion rule, but the employee must be placed on a GS step rate in the post-promotion grade.