(1) Any bonds issued pursuant to the provisions of this article and at any time outstanding may be refunded at any time and from time to time by a county or municipality by the issuance of its refunding bonds in such amount as the governing body may determine to refund the principal of the bonds to be so refunded, all accrued and unaccrued interest thereon to the normal maturity dates of such bonds or to the prior redemption dates selected by the county or municipality in accordance with the proceedings under which the bonds to be refunded were issued, including any mortgage or trust indenture given to secure the same, and any premiums and incidental expenses necessary to be paid in connection therewith. The principal amount of any such refunding bonds may be equal to, less than, or greater than the principal amount of the bonds to be so refunded. The net effective interest rate on any such refunding bonds may be equal to, less than, or greater than the net effective interest rate on the bonds to be so refunded.

(2) Any such refunding may be effected, whether the bonds to be refunded have matured or shall mature thereafter, either by sale of the refunding bonds and the application of the proceeds thereof, directly or indirectly, to the payment of the bonds to be refunded thereby or by exchange of the refunding bonds for the bonds to be refunded thereby, but the holders of any bonds to be so 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 at normal maturity date or prior redemption date selected by the county or municipality in accordance with the proceedings under which the bonds to be refunded were issued, including any mortgage or trust indenture given to secure the same.

(3) The proceeds of the refunding bonds shall either be immediately applied to the retirement of the bonds to be so refunded or be placed in escrow in any state or national bank within or without this state which possesses and is exercising trust powers to be applied to the payment of the bonds being refunded or the refunding bonds or both upon their presentation therefor, to the extent, in such priority, and otherwise in the manner in which the county or municipality may determine. Except to the extent expressly inconsistent with the provisions of this article, the proceedings under which the bonds to be so refunded were issued, including any mortgage or trust indenture given to secure the same, shall govern the issuance of such refunding bonds, the establishment of any escrow in connection therewith, and the investment and reinvestment of any escrowed proceeds.

(4) All refunding bonds issued under authority of this article shall be payable solely from revenues out of which the bonds to be refunded thereby are payable or from revenues out of which bonds of the same character may be made payable under this article or any other law in effect at the time of the refunding or from the escrowed proceeds of such refunding bonds, including any proceeds realized from the investment and reinvestment of such escrowed proceeds.