The board of any district having issued bonds under the provisions of this article is hereby empowered thereafter by resolution to issue refunding bonds of such district for the purpose of retiring or refinancing such outstanding bonds, together with any unpaid interest thereon and redemption premium thereunto appertaining and all of the provisions of this article relating to the issuance, security and payment of bonds shall be applicable to such refunding bonds, subject, however, to the provisions of the proceedings which authorized the issuance of the bonds to be so refunded.