Tex. Gov't Code § 2001.042

Notwithstanding any other law, in a judicial proceeding in this state, including an action subject to Section 2001.038, a court is not required to give deference to a state agency's legal determination regarding the construction, validity, or applicability of the law or a rule adopted by the state agency responsible for the rule's administration, implementation, or other enforcement. This section does not prohibit a court from giving consideration to a legal determination made by a state agency that is reasonable and does not conflict with the plain language of the statute.