[Code of Federal Regulations] [Title 5, Volume 2, Parts 700 to 1199] [Revised as of January 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 5CFR847.442] [Page 361] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER I--OFFICE OF PERSONNEL MANAGEMENT (Continued) PART 847--ELECTIONS OF RETIREMENT COVERAGE BY CURRENT AND FORMER EMPLOYEES OF NONAPPROPRIATED FUND INSTRUMENTALITIES--Table of Contents Subpart D--Elections of Coverage Under the Retroactive Provisions Sec. 847.442 Effective date. (a) An election under Sec. 847.441 is effective on the first day of FERS-covered employment following NAFI employment subject to retirement coverage. (b) Deductions and contributions for NAFI retirement system coverage begin effective on the first day of the next pay period after the agency receives the employee's election under Sec. 847.441(a). (c) An election under Sec. 847.441 is irrevocable when received by the employing agency.