5 CFR §630.1505

1. (a)Commencement. Notice leave may commence only after an employee has received written notice of a proposed adverse action. There is no requirement that the employee exhaust 10 workdays of administrative leave under 5 U.S.C. 6329a(b) and § 630.1404 before the employee may be placed on notice leave.
2. (b)Duration. Placement of an employee on notice leave shall be for a period not longer than the duration of the notice period.
3. (c)Written explanation of leave. If an agency places an employee on notice leave, the agency must provide the employee with a written explanation regarding the placement of the employee on notice leave. The written explanation must provide information on the employee's notice period and include a statement that the notice leave will be provided only during the notice period.