38 USC 1963 - Authority for payment of interest on settlements

(a) Subject to subsection (b) of this section, the Secretary may pay interest on the proceeds of a United States Government Life Insurance policy from the date the policy matures to the date of payment of the proceeds to the beneficiary or, in the case of an endowment policy, to the policyholder.
(b) 
(1) The Secretary may pay interest under subsection (a) of this section only if the Secretary determines that the payment of such interest is administratively and actuarially sound for the settlement option involved.
(2) Interest paid under subsection (a) shall be at the rate that is established by the Secretary for dividends held on credit or deposit in policyholders accounts.