Texas Health and Safety Code - HEALTH & SAFETY § 481.062. Exemptions

(1) an agent or employee of a manufacturer, distributor, analyzer, or dispenser of the controlled substance who is registered with the Federal Drug Enforcement Administration and acting in the usual course of business or employment;

(2) a common or contract carrier, a warehouseman, or an employee of a carrier or warehouseman whose possession of the controlled substance is in the usual course of business or employment;

(3) an ultimate user or a person in possession of the controlled substance under a lawful order of a practitioner or in lawful possession of the controlled substance if it is listed in Schedule V;

(4) an officer or employee of this state, another state, a political subdivision of this state or another state, or the United States who is lawfully engaged in the enforcement of a law relating to a controlled substance or drug or to a customs law and authorized to possess the controlled substance in the discharge of the person's official duties;

(5) if the substance is tetrahydrocannabinol or one of its derivatives:

(6) a dispensing organization licensed under Chapter 487 that possesses low-THC cannabis.