Texas Property Code - PROP § 141.021. Termination of Custodianship

(1) the minor attains 21 years of age, with respect to custodial property transferred under Section 141.005 or 141.006;

(2) the minor attains the age of majority under the laws of this state other than this chapter, with respect to custodial property transferred under Section 141.007 or 141.008;  or

(3) the minor's death.