[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: 5CFR847.601] [Page 389] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER I--OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) PART 847_ELECTIONS OF RETIREMENT COVERAGE BY CURRENT AND FORMER EMPLOYEES OF Subpart F_Additional Employee Costs Under the Retroactive Provisions Sec. 847.601 Purpose and scope. (a) The purpose of this subpart is to establish the methodology that OPM will use to determine-- (1) The cost of an employee's election under Sec. 847.411 or Sec. 847.421; and (2) The amount by which annuity payments may be affected as a result of the election. (b) This subpart applies only to CSRS and FERS benefits. The Departments of Defense, and the U.S. Coast Guard will issue regulations providing methodologies for NAFI's under their jurisdictions.