[Code of Federal Regulations] [Title 5, Volume 3] [Revised as of January 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 5CFR1620.34] [Page 212] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER VI--FEDERAL RETIREMENT THRIFT INVESTMENT BOARD PART 1620--EXPANDED AND CONTINUING ELIGIBILITY--Table of Contents Subpart D--Nonappropriated Fund Employees Sec. 1620.34 Employees who move from a NAF instrumentality to a Federal Government agency. (a) An employee of a NAF instrumentality who moves from a NAF instrumentality to a Federal Government agency and who elects to be covered by a NAF retirement system is not eligible to participate in the TSP. Any TSP contributions relating to a period for which an employee elects retroactive NAF retirement coverage must be removed from the TSP as required by the regulations at 5 CFR part 1605. (b) An employee of a NAF instrumentality who moves from a NAF instrumentality to a Federal Government agency and who elects to be covered by CSRS or FERS will become eligible to participate in the TSP as determined in accordance with 5 CFR part 1600.