5 CFR § 847.806
How much NAFI service must employees elect to use to qualify for an immediate CSRS or FERS retirement?
November 4, 2020
(a) Employees must elect complete periods of NAFI service under this subpart.
(b) A complete period of NAFI service in paragraph (a) of this section consists of the period from the date of appointment with an NAFI employer to the date of termination.