Tex. Business Organizations Code § 21.413: QUORUM.

(a) A quorum of the board of directors is the majority of the number of directors set or established in the manner provided by the certificate of formation or bylaws of a corporation unless the laws of this state, the certificate of formation, or the bylaws require a different number or portion.

(b) Neither the certificate of formation nor the bylaws may provide that less than one-third of the number of directors constitutes a quorum.

Acts 2003, 78th Leg., ch. 182, Sec. 1, eff. Jan. 1, 2006.