Texas Election Code - ELEC § 1.020. Voting Disability or Candidacy Disqualification:  Determination of Mental Incapacity

(a) A person determined to be totally mentally incapacitated by a court exercising probate jurisdiction is not subject to a voting disability or candidacy disqualification under this code if, subsequent to that determination, the person's mental capacity has been completely restored by a final judgment of a court exercising probate jurisdiction.

(b) A person determined to be partially mentally incapacitated without the right to vote by a court exercising probate jurisdiction is not subject to a voting disability or candidacy disqualification under this code if, subsequent to that determination, the person's guardianship has been modified to include the right to vote or the person's mental capacity has been completely restored by a final judgment of a court exercising probate jurisdiction.