5 C.F.R. § 892.203 When will my premium conversion begin?
Title 5 - Administrative Personnel
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]
Title 5: Administrative Personnel
PART 892—FEDERAL FLEXIBLE BENEFITS PLAN: PRE-TAX PAYMENT OF HEALTH BENEFITS PREMIUMS
Subpart B—Eligibility and Participation
§ 892.203 When will my premium conversion begin?