Texas Business Organizations Code - BUS ORG § 20.002. Ultra Vires Acts

(a) Lack of capacity of a corporation may not be the basis of any claim or defense at law or in equity.

(b) An act of a corporation or a transfer of property by or to a corporation is not invalid because the act or transfer was:

(c) The fact that an act or transfer is beyond the scope of the expressed purpose or purposes of the corporation or is inconsistent with an expressed limitation on the authority of an officer or director may be asserted in a proceeding:

(d) If the unauthorized act or transfer sought to be enjoined under Subsection (c)(1) is being or is to be performed or made under a contract to which the corporation is a party and if each party to the contract is a party to the proceeding, the court may set aside and enjoin the performance of the contract.  The court may award to the corporation or to another party to the contract, as appropriate, compensation for loss or damage resulting from the action of the court in setting aside and enjoining the performance of the contract, excluding loss of anticipated profits.