Texas Property Code - PROP § 221.086. Quorum

(a) Unless the project instrument provides for a larger quorum requirement, the percentage of voting interests constituting a quorum at a meeting of the members of an association is 10 percent of the voting interests of owners who are not delinquent in assessments, voting in person or by proxy.

(b) If a quorum is not present at any meeting of the association at which board members will be elected, the meeting may be adjourned and reconvened not later than the 90th day after the date of adjournment for the sole purpose of electing board members.  Unless the project instrument provides for a larger quorum requirement, the quorum for the reconvened meeting is 10 percent of the voting interests of owners who are not delinquent in assessments, voting in person or by proxy.

(c) Unless the project instrument provides otherwise, a quorum of the board is considered present throughout a board meeting if the members entitled to cast a majority of the votes are present at the beginning of the meeting.