Texas Election Code - ELEC § 20.063. Registration Procedures

(a) The Department of Public Safety shall provide to each person who applies in person at the department's offices for an original or renewal of a driver's license, a personal identification card, or a duplicate or corrected license or card an opportunity to complete a voter registration application form.

(b) When the department processes a license or card for renewal by mail, the department shall deliver to the applicant by mail a voter registration application form.

(c) A change of address that relates to a license or card and that is submitted to the department in person or by mail serves as a change of address for voter registration unless the licensee or cardholder indicates that the change is not for voter registration purposes.  The date of submission of a change of address to a department employee is considered to be the date of submission to the voter registrar for the purpose of determining the effective date of registration only.

(d) If a completed voter registration application submitted to a department employee does not include the applicant's correct driver's license number or personal identification card number, a department employee shall enter the appropriate information on the application.  If a completed application does not include the applicant's correct residence address or mailing address, a department employee shall obtain the appropriate information from the applicant and enter the information on the application.