CFR > Title 5 - Administrative Personnel > CHAPTER I—OFFICE OF PERSONNEL MANAGEMENT > SUBCHAPTER B—CIVIL SERVICE REGULATIONS (parts 110 to 990) > PART 847—ELECTIONS OF RETIREMENT COVERAGE BY CURRENT AND FORMER EMPLOYEES OF NONAPPROPRIATED FUND INSTRUMENTALITIES > SUBPART D—Elections of Coverage Under the Retroactive Provisions (§847.401 to §847.443) > 847.413—Effective date of an election.

847.413—Effective date of an election.

(a) An election under § 847.411 is effective on the first day of NAFI employment subject to retirement coverage following CSRS- or FERS-covered employment.
(b) Deductions and contributions for CSRS or FERS coverage under § 831.111 or § 841.501 of this chapter begin effective on the first day of the next pay period after the agency receives the employee's election under § 847.411(a).
(c) An election under § 847.411 is irrevocable when received by the employing agency.
(d) NAFI service performed on and after the effective date of an election under § 847.411 becomes fully creditable for retirement eligibility and computation of the annuity benefit, including computation of average pay.