Any bonds issued hereunder and at any time outstanding may at any time and from time to time be refunded by a county by the issuance of its refunding bonds in such amount as the commission may deem necessary but not exceeding any amount sufficient to refund the principal of the bonds to be refunded, together with any unpaid interest and any premiums and commissions necessary to be paid in connection with them. Any such refunding may be effected whether the bonds to be refunded have matured or mature thereafter, either by sale of the refunding bonds and the application of the proceeds for the payment of the bonds to be refunded, or by exchange of the refunding bonds for the bonds to be refunded. The holders of any bonds to be refunded shall not be compelled without their consent to surrender their bonds for payment or exchange prior to the date on which they are payable, or, if they are called for redemption, prior to the date on which they are by their terms subject to redemption. Any refunding bonds issued under the authority of the County Industrial Revenue Bond Act shall be payable solely from the revenues out of which the bonds to be refunded were payable, and shall be subject to the provisions contained in Section 5 [4-59-5 N.M. Stat. Ann.] of the County Industrial Revenue Bond Act, and may be secured in accordance with the provisions of Section 6 [4-59-6 N.M. Stat. Ann.] of the County Industrial Revenue Bond Act.