Tex. Water Code § 36.10835

(a) A final district order issued under Section 36.1083 may be appealed to a district court with jurisdiction over any part of the territory of the district that issued the order. An appeal under this subsection must be filed with the district court not later than the 45th day after the date the district issues the final order. The case shall be decided under the substantial evidence standard of review as provided by Section 2001.174, Government Code. If the court finds that a desired future condition is unreasonable, the court shall strike the desired future condition and order the districts in the same management area as the district that received the petition to reconvene not later than the 60th day after the date of the court order in a joint planning meeting for the purpose of revising the desired future condition. The districts in the management area shall follow the procedures in Section 36.108 to adopt new desired future conditions applicable to the district that received the petition.

(b) A court's finding under this section does not apply to a desired future condition that is not a matter before the court.