5 C.F.R. § 1650.12 Single payment.
Title 5 - Administrative Personnel
(a) Partial withdrawal. A participant can elect to withdraw a portion of his or her account balance in a single payment and leave the rest in the TSP until a later date, subject to §1650.16 and the following requirements: (1) The participant is eligible for a partial withdrawal only if he or she did not make an age-based in-service withdrawal from that account. (2) The participant may not elect a partial withdrawal of less than $1,000. (3) Only one partial withdrawal from that account is permitted. (b) Full withdrawal. A participant can elect to withdraw his or her entire account balance in a single payment.
Title 5: Administrative Personnel
PART 1650—METHODS OF WITHDRAWING FUNDS FROM THE THRIFT SAVINGS PLAN
Subpart B—Post-Employment Withdrawals
§ 1650.12 Single payment.