5 C.F.R. § 890.603
Effective date
The effective date of an enrollment under § 890.602 is the first day of the first pay period after the election is received by the retirement system, but not earlier than January 1, 1979.
The effective date of an enrollment under § 890.602 is the first day of the first pay period after the election is received by the retirement system, but not earlier than January 1, 1979.