Tex. Spec. Dists. Code § 11010.203
For the purposes of attorney general review and approval and in lieu of any other manner of demonstrating the ability to pay debt service and satisfy any other pecuniary obligations relating to bonds, notes, or other obligations, the authority may demonstrate the authority's ability to satisfy the debt service and those obligations using accumulated funds of the authority and revenue and growth projections prepared by a professional utility rate consultant at the direction of the authority. If the resolution authorizing the issuance of the bonds, notes, or other obligations provides that the authority intends to increase rates to the extent necessary to pay debt service and satisfy any other pecuniary obligations arising under the bonds, notes, or other obligations, the revenue projections prepared by a professional utility rate consultant may include forecast rate increases and accumulated and available fund balances as determined by the authority.
Tex. Spec. Dist. Loc. Laws § 11010.203