Tex. Bus. Orgs. Code § 101.359
Members or managers of a limited liability company may take action at a meeting of the members or managers or without a meeting in any manner permitted by this title, Title 1, or the governing documents of the company. Unless otherwise provided by the governing documents, an action is effective if it is taken:
(2) with the consent of each member of the limited liability company, which may be established by:
Added by Acts 2005, 79th Leg., Ch. 64 (H.B. 1319), Sec. 75, eff. January 1, 2006.