(a) A district may issue bonds to refund all or any part of its outstanding bonds, including matured but unpaid interest coupons.
(b) Refunding bonds shall mature serially or otherwise not more than 25 years after their date of issue and shall bear interest at any rate or rates permitted by state law.

(c) Refunding bonds may be payable from the same source as the bonds being refunded or from other sources.
(d) The refunding bonds must be approved by the attorney general as provided by § 772.226 and shall be registered by the comptroller on the surrender and cancellation of the bonds being refunded.
(e) The orders or resolutions authorizing the issuance of the refunding bonds may provide that they be sold and the proceeds deposited in the place or places at which the bonds being refunded are payable, in which case the refunding bonds may be issued before the cancellation of the bonds being refunded. If refunding bonds are issued before cancellation of the other bonds, an amount sufficient to pay the principal of the bonds being refunded and interest on those bonds accruing to their maturity dates or to their option dates if the bonds have been duly called for payment before maturity according to their terms shall be deposited in the place or places at which the bonds being refunded are payable. The comptroller shall register the refunding bonds without the surrender and cancellation of bonds being refunded.
(f) A refunding may be accomplished in one or in several installment deliveries. Refunding bonds and their interest coupons are investment securities under Chapter 8, Business & Commerce Code.
(g) In lieu of the method set forth in Subsections (a)-(f), a district may refund bonds, notes, or other obligations as provided by the general laws of this state.