Texas Transportation Code - TRANSP § 547.101. Rules and Standards in General

(1) protect the public from unreasonable risk of death or injury;  and

(2) enforce safety standards of the United States as permitted under the federal motor vehicle act.

(1) duplicate a standard of the United States that applies to the same aspect of vehicle equipment performance as the department standard;  or

(2) if there is no standard of the United States for the same aspect of vehicle equipment performance as the department standard, conform as closely as possible to a relevant standard of the United States, similar standards established by other states, and a standard issued or endorsed by recognized national standard-setting organizations or agencies.