Tex. Business Organizations Code § 22.220

(a) The certificate of formation or bylaws of a corporation may provide that an action required by this chapter to be taken at a meeting of the corporation's directors or an action that may be taken at a meeting of the directors or a committee may be taken without holding a meeting, providing prior notice, or taking a vote if a written consent, stating the action to be taken, is signed by the number of directors or committee members necessary to take that action at a meeting at which all of the directors or committee members are present and voting. The consent must state the date of each director's or committee member's signature.

(b) Prompt notice of the taking of an action by directors or a committee without a meeting by less than unanimous written consent shall be given to each director or committee member who did not consent in writing to the action.

(c) Notwithstanding a provision of this code, advance notice is not required to be given to take an action by written consent as provided by this section.