Texas Estates Code - EST § 1202.002. Termination of Guardianship if Parent Is No Longer Incapacitated

(a) The powers of a person appointed to serve as the designated guardian of the person or estate, or both, of a minor child solely because of the incapacity of the minor's surviving parent and in accordance with Section 1104.053 and Subchapter D, Chapter 1104,  1 terminate when a probate court enters an order finding that the surviving parent is no longer an incapacitated person.

(b) The powers of a person appointed to serve as the designated guardian of the person or estate, or both, of an adult individual solely because of the incapacity of the individual's surviving parent and in accordance with Section 1104.103 and Subchapter D, Chapter 1104, terminate when a probate court enters an order finding that the surviving parent is no longer an incapacitated person and reappointing the surviving parent as the individual's guardian.