I was wrong. Notice must be given not less than 10 days nor more than 60 days for a Texas corporation.
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"Art. 2.25. Notice of Shareholders' Meetings
A. Written or printed notice stating the place, day and hour of the meeting, the means of any remote communications by which
shareholders may be considered present and may vote at the meeting, and, in case of a special meeting, the purpose or purposes for which the meeting is called, shall be delivered not less than ten (10) days nor more than sixty (60) days before the date of the meeting, personally, by electronic transmission, or by mail, by or at the direction of the president, the secretary, or the officer or person calling the meeting, to each shareholder entitled to vote at such meeting. If mailed, such notice shall be deemed to be delivered when deposited in the United States mail addressed to the shareholder at his address as it appears on the share transfer records of the corporation, with postage thereon prepaid."