31 C.F.R. § 341.6 Nontransferability.
Title 31 - Money and Finance: Treasury
United States Retirement Plan Bonds are not transferable, and may not be sold, discounted or pledged as collateral for a loan or as security for the performance of an obligation, or for any other purpose.
Title 31: Money and Finance: Treasury
PART 341—REGULATIONS GOVERNING UNITED STATES RETIREMENT PLAN BONDS
§ 341.6 Nontransferability.