Any workers' compensation debt reduction revenue bonds which are outstanding may at any time be refunded by the issuance of refunding bonds in an amount deemed necessary to refund the principal of the bonds to be refunded, together with any unpaid interest thereon; to accomplish the purpose of this article; and to pay any premiums and commissions necessary to be paid in connection therewith. Any refunding may be effected whether the workers' compensation debt reduction revenue bonds to be refunded shall have then matured or shall thereafter mature. Any refunding bonds issued pursuant to this article shall be payable from the workers' compensation debt reduction revenue bond debt service fund shall be secured in accordance with the provisions of this article.