5 CFR §892.203
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.