5 CFR 1650.31 – Age-based withdrawals
(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 record keeper roll over all or a portion of the withdrawal to a traditional IRA, an eligible employer plan, or a Roth IRA in accordance with § 1650.25.
(c) A participant is permitted four age-based withdrawals per calendar year for an account. Only one age-based withdrawal election per account will be processed in any 30-calendar-day-period.