The moneys and securities held by the commission pursuant to this subsection (d) shall be held by the commission in trust for the payment of the principal or redemption price, if applicable, of and interest on the bonds for the payment or redemption of which such provision is made: Provided, That any cash received from principal or interest payments on securities so held by the commission, if not then needed for such purpose, shall, to the extent practicable, be reinvested in securities maturing at times and in principal amounts sufficient to pay when due the principal or redemption price, if applicable, of and interest to become due on such bonds on and prior to the redemption date or maturity date thereof, as the case may be, and the interest earned from any such reinvestments shall be paid over to the municipality which issued such bonds, as received by the commission, free and clear of any trust. Any moneys, and the proceeds of any securities, held by the commission in trust for the redemption, if applicable, or for the payment and discharge of any series of bonds, which are in excess of the moneys required to fully pay and discharge such bonds, by redemption, if applicable, or upon maturity thereof, shall also be transferred to the general fund of the municipality which issued such bonds after such bonds are redeemed, if applicable, or after such bonds are fully paid and discharged at maturity, as the case may be.
W. Va. Code § 8-13-20