Tex. Health and Safety Code § 161.003: IMMUNIZATION REMINDER NOTICES.

(a) In a program administered by the department in which an immunization reminder notice is sent regarding the immunization of a child, the notice must be sent without discrimination based on the legitimacy of the child.

(b) The reminder notice must be addressed to an adult or parent and may not use:

(1) an indication of the marital status of the addressee; or

(2) the terms "Mr.," "Mrs.," "Miss," or "Ms."

Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. Sept. 1, 1989.