[Code of Federal Regulations] [Title 5, Volume 2] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 5CFR839.603] [Page 254] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER I--OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) PART 839_CORRECTION OF RETIREMENT COVERAGE ERRORS UNDER THE FEDERAL ERRONEOUS Subpart F_Making an Election Sec. 839.603 Can I later change my election? Your election is irrevocable once your employer or OPM processes it. If you do not make a timely election, the resulting coverage (see Sec. 839.602) is also irrevocable.