Texas Government Code - GOV'T § 3002.109. Jurisdiction

(a) Notwithstanding any other law, including Chapter 37, Civil Practice and Remedies Code, and Sections 22.002, 22.221, 24.007, 24.008, 24.009, 24.010, and 24.011 of this code, a court of this state does not have jurisdiction to consider and may not award declaratory or injunctive relief, or any type of writ, including a writ of prohibition, that would:

(b) Notwithstanding any other law, including Chapter 26, Civil Practice and Remedies Code, and Rule 42, Texas Rules of Civil Procedure, a court may not certify a claimant class or a defendant class in a civil action that seeks relief described by this section.