5 CFR § 892.203 - When will my premium conversion begin?

If you are newly employed or newly eligible for FEHB in a covered Executive Branch agency (as described in § 892.201(a)), your salary reduction (through a Federal allotment) and pre-tax benefit will be effective on the 1st day of the first pay period beginning on or after your employing agency receives your enrollment.

[68 FR 56528, Oct. 1, 2003]