REFUNDING BONDS.

(a) The district may issue refunding bonds to refund:

(1) outstanding bonds issued by the district and interest on those bonds; or

(2) outstanding bonds of the city assumed by the district.

(b) Refunding bonds may:

(1) be issued to refund more than one series of outstanding district bonds, including bonds assumed by the district;

(2) combine the pledges of net revenue, taxes, or both, that secure the outstanding bonds for the security of the refunding bonds; and

(3) be secured by a pledge of other or additional revenue.

(c) Refunding bonds may be combined and issued jointly with new money bonds to be issued and sold to carry out a power for which the district may issue bonds.

(d) The comptroller shall register the refunding bonds on the surrender and cancellation of the bonds to be refunded.

(e) Instead of issuing bonds to be registered on the surrender and cancellation of the bonds to be refunded, the district, in the resolution authorizing the issuance of the refunding bonds, may provide for the sale of the refunding bonds and the deposit of the proceeds in a bank at which the bonds to be refunded are payable. In that case, the refunding bonds may be issued in an amount sufficient to pay the interest on the bonds to be refunded to their option date or maturity date, and the comptroller shall register the refunding bonds without the surrender and cancellation of the bonds to be refunded.