5 CFR § 1601.12
Investing future deposits in the TSP Funds
November 4, 2020
(a) Allocation. Future deposits in the TSP, including contributions, loan payments, and transfers or rollovers from traditional IRAs and eligible employer plans, will be allocated among the TSP Funds based on the most recent contribution allocation on file for the participant.
(b) TSP Funds availability. All participants may elect to invest all or any portion of their deposits in any of the TSP Funds.
[70 FR 32207, June 1, 2005]