Tex. Bus. Orgs. Code § 21.711

A shareholders' meeting required by Section 21.710(c)(2) shall be promptly called after the termination of close corporation status takes effect. If a meeting is not called before the 31st day after the date the termination takes effect, a shareholder may call a shareholders' meeting on the provision of notice required by Section 21.353, regardless of whether the shareholder is entitled to call a shareholders' meeting or vote at the meeting. At the meeting, the shareholders shall elect the number of directors specified in the certificate of formation or bylaws of the corporation or, in the absence of any specification, three directors.