Tex. Election Code § 13.033

(a) A person desiring to serve as a volunteer deputy registrar must request appointment by the registrar in person or by mail.

(b) If a person is to be appointed, the registrar shall prepare a certificate of appointment in duplicate containing:

(1) the date of appointment;

(2) the statement: "I, ____________, Voter Registrar for ____________ County, do hereby appoint ____________ as a volunteer deputy registrar for ____________ County.";

(3) the person's residence address;

(4) the person's voter registration number, if any;

(5) a statement that the term of the appointment expires December 31 of an even-numbered year; and

(6) a statement that the appointment terminates on the person's final conviction for an offense for failure to deliver a registration application and may terminate on the registrar's determination that the person failed to adequately review a registration application, intentionally destroyed or physically altered a registration application, or engaged in any other activity that conflicts with the responsibilities of a volunteer deputy registrar under this chapter.

(c) The registrar shall sign the certificate and issue the original to the appointee, who shall sign it on receipt.

(d) A volunteer deputy shall present the certificate as identification to an applicant for registration, on request, when receiving the application for delivery to the registrar.