Texas law sets restrictions on vaccine "passports" for both governments and businesses.
Section 161.0085 of the Texas Health & Safety Code. prohibits state and local governments from issuing:
a vaccine passport, vaccine pass, or other standardized documentation to certify an individual's COVID-19 vaccination status to a third party for a purpose other than health care or otherwise publish or share any individual's COVID-19 immunization record or similar health information for a purpose other than health care.
Businesses also cannot require proof of COVID-19 vaccination status from customers, according to Section 161.0085(c).
A business that violates this law is not eligible for public funding or licensing from the state of Texas. The law tasks "each appropriate state agency" with ensuring that businesses comply with the law.