Tex. Loc. Gov't Code § 382.159
The commissioners court may authorize a district, by a lease, lease-purchase agreement, installment purchase contract, or other agreement, or by the imposition or assessment of a tax, user fee, concession, rental, or other revenue or resource of the district, to provide for or secure the payment or repayment of:
(3) the district's contractual obligations or indebtedness.
Transferred from Local Government Code, Subchapter C, Chapter 372 and amended by Acts 2009, 81st Leg., R.S., Ch. 87 (S.B. 1969), Sec. 15.009, eff. September 1, 2009.