Texas Government Code - GOV'T § 1205.021. Authority to Bring Action

(A) the election at which the public securities were authorized;

(B) the organization or boundaries of the issuer;

(C) the imposition of an assessment, a tax, or a tax lien;

(D) the execution or proposed execution of a contract;

(E) the imposition of a rate, fee, charge, or toll or the enforcement of a remedy relating to the imposition of that rate, fee, charge, or toll;  and

(F) the pledge or encumbrance of a tax, revenue, receipts, or property to secure the public securities;