Tex. Educ. Code § 55.19
Any bonds or notes at any time issued by a board may be refunded or otherwise refinanced by the issuance by the board of refunding bonds for such purpose, under such terms, conditions, and details as may be determined by resolution of the board. All pertinent and appropriate provisions of this subchapter shall be applicable to such refunding bonds, and they shall be issued in the manner provided herein for other bonds authorized under this subchapter; provided that such refunding bonds may be sold and delivered in amounts necessary to pay the principal, interest, and redemption premium, if any, of bonds or notes to be funded or refunded, at maturity or on any redemption date. Also, such refunding bonds may be issued to be exchanged for the bonds or notes being refunded thereby. In the latter case, the Comptroller of Public Accounts of the State of Texas shall register the refunding bonds and deliver the same to the holder or holders of the bonds or notes being refunded thereby, in accordance with the provisions of the resolution authorizing the refunding bonds; and any such exchange may be made in one delivery, or in several installment deliveries. Bonds issued at any time by a board also may be refunded in the manner provided by any other applicable law.
Tex. Educ. Code § 55.19