(a) Upon termination of family allowances under this part and prior to the payment of allowances equal to the amount of the member’s accumulated retirement contributions at the time of death, the balance shall be paid to the member’s beneficiary.
(b) Payments provided under this section shall include credited interest on the unpaid balance calculated from the date family allowances were last paid or from the date of death, if no family allowance payments were made, to the date the balance is paid.