5 C.F.R. § 1650.31 Age-based withdrawals.
Title 5 - Administrative Personnel
(a) A participant who has reached age 59 (b) An age-based withdrawal is an eligible rollover distribution, so a participant may request that the TSP transfer all or a portion of the withdrawal to a tradition IRA or an eligible employer plan. (c) A participant is permitted only one age-based withdrawal for an account. (d) A participant who makes an age-based withdrawal is not eligible to make a partial withdrawal after separating from Government service.
Title 5: Administrative Personnel
PART 1650—METHODS OF WITHDRAWING FUNDS FROM THE THRIFT SAVINGS PLAN
Subpart D—In-Service Withdrawals
§ 1650.31 Age-based withdrawals.