5 C.F.R. § 839.213 – May I make a retirement coverage election if I withdrew all or part of my TSP account after I was corrected to FERS?

(a) You may not make a retirement coverage election if your qualifying retirement coverage error was previously corrected to FERS, and you later received one of the following TSP withdrawals:
1. (1) A TSP annuity after separation from service, but before receiving a FERS annuity; or
2. (2) A single payment or monthly payments after separation from service; or
3. (3) An age-based in-service withdrawal.
(b) If you received an automatic cashout of your TSP account after you separated (because your account balance was $3,500 or less), or if you received a financial hardship in-service withdrawal, you may make a retirement coverage election.