5 C.F.R. § 1650.34 Uniqueness of loans and withdrawals.
Title 5 - Administrative Personnel
An outstanding TSP loan cannot be converted into an in-service withdrawal or vice versa. Funds distributed as an in-service withdrawal cannot be returned or repaid.
Title 5: Administrative Personnel
PART 1650—METHODS OF WITHDRAWING FUNDS FROM THE THRIFT SAVINGS PLAN
Subpart D—In-Service Withdrawals
§ 1650.34 Uniqueness of loans and withdrawals.
