Texas Education Code - EDUC § 54.804. Limitations

(1) the 10th anniversary of the date the beneficiary is projected to graduate from high school, as indicated by the purchaser in the enrollment contract, except that time spent by the beneficiary as an active duty member of the United States armed services tolls the period described by this subdivision;

(2) a change of beneficiary by the account owner or purchaser of the matched account;

(3) a contract cancellation of the matched account and refund request;

(4) the successful completion by the beneficiary of an associate or bachelor's degree program;

(5) transfer of the matched account to another qualified tuition program of any state that meets the requirements of Section 529, Internal Revenue Code of 1986;  or

(6) any other event the board or program entity determines would be inconsistent with the program's purposes.