5 C.F.R. § 847.402

(a) A qualifying move occurring after December 31, 1965, and before August 10, 1996, which would allow an employee the opportunity to elect to continue retirement coverage under CSRS or FERS retroactive to the date of the move must meet all the following criteria:

(1)(i) For moves occurring before February 10, 1996, the employee must not have had a prior opportunity to elect to continue CSRS, FERS, or NAFI retirement coverage under § 847.202(e) or (f);

(ii) For moves occurring on or after February 10, 1996, the employee must not have made an election under § 847.202(e) or (f);

(2) The employee must have been vested in CSRS or FERS prior to the move to a NAFI;

(3) The employee must have moved from a position covered by CSRS or FERS to a retirement-covered position in a NAFI;

(4) The employee must have begun employment in a retirement-covered position in a NAFI no later than 1 year after separation from CSRS- or FERS-covered employment; and

(5) The employee must, since moving to the NAFI position, have continuously participated in a retirement system established for NAFI employees, disregarding any break in service of not more than 3 days.

(b) A qualifying move occurring after December 31, 1965, and before August 10, 1996, which would allow an employee the opportunity to elect to continue retirement coverage under a NAFI retirement system retroactive to the date of the qualifying move must meet all the following criteria:

(1)(i) For moves occurring before February 10, 1996, the employee must not have had a prior opportunity to elect to continue CSRS, FERS, or NAFI retirement coverage under § 847.202(e) or (f);

(ii) For moves occurring on or after February 10, 1996, the employee must not have made an election under § 847.202(e) or (f);

(2) The employee must have been a vested participant in the NAFI retirement system (as the term “vested participant” is defined by that retirement system) prior to the move to a FERS-covered position;

(3) The employee must have moved from a NAFI to a civil service position subject to FERS coverage or CSRS/SS coverage, as defined in § 846.102 of this chapter, followed by the employee's automatic conversion to FERS coverage;

(4) The employee must have been appointed to a FERS-covered position no later than 1 year after separation from retirement-covered NAFI employment; and

(5) The employee must, since moving to the FERS position, have been continuously covered by FERS, disregarding any break in service of not more than 3 days.

(c) A move from a NAFI to CSRS, including CSRS/SS as defined under § 846.102 of this chapter followed by an election of FERS coverage under § 846.201 of this chapter, is not a qualifying move for an election of retirement coverage under § 847.431 (pertaining to elections of NAFI service credit for FERS service) and § 847.441 (pertaining to elections of NAFI retirement coverage).

(d) A qualifying move under paragraphs (a) and (b) of this section is considered to occur on the date the individual entered into the new position, not at the time of separation from the prior position.