(a) The provisions of this chapter relating to the possession and distribution of peyote do not apply to the use of peyote by a member of the Native American Church in bona fide religious ceremonies of the church or to a person who supplies the substance to the church. An exemption granted to a member of the Native American Church under this section does not apply to a member with less than 25 percent Indian blood.
(b) The provisions of this chapter relating to the possession of denatured sodium pentobarbital do not apply to possession by personnel of a humane society or an animal control agency for the purpose of destroying injured, sick, homeless, or unwanted animals if the humane society or animal control agency is registered with the Federal Drug Enforcement Administration. The provisions of this chapter relating to the distribution of denatured sodium pentobarbital do not apply to a person registered as required by Subchapter C, who is distributing the substance for that purpose to a humane society or an animal control agency registered with the Federal Drug Enforcement Administration.

(c) A person does not violate § 481.113, 481.116, 481.1161, 481.121, or 481.125 if the person possesses or delivers tetrahydrocannabinols or their derivatives, or drug paraphernalia to be used to introduce tetrahydrocannabinols or their derivatives into the human body, for use in a federally approved therapeutic research program.
(d) The provisions of this chapter relating to the possession and distribution of anabolic steroids do not apply to the use of anabolic steroids that are administered to livestock or poultry.
(e) Sections 481.120, 481.121, 481.122, and 481.125 do not apply to a person who engages in the acquisition, possession, production, cultivation, delivery, or disposal of a raw material used in or by-product created by the production or cultivation of low-THC cannabis if the person:
(1) for an offense involving possession only of marihuana or drug paraphernalia, is a patient for whom low-THC cannabis is prescribed under Chapter 169, Occupations Code, or the patient’s legal guardian, and the person possesses low-THC cannabis obtained under a valid prescription from a dispensing organization; or
(2) is a director, manager, or employee of a dispensing organization and the person, solely in performing the person’s regular duties at the organization, acquires, possesses, produces, cultivates, dispenses, or disposes of:
(A) in reasonable quantities, any low-THC cannabis or raw materials used in or by-products created by the production or cultivation of low-THC cannabis; or
(B) any drug paraphernalia used in the acquisition, possession, production, cultivation, delivery, or disposal of low-THC cannabis.
(f) For purposes of Subsection (e):
(1) “Dispensing organization” has the meaning assigned by § 487.001.
(2) “Low-THC cannabis” has the meaning assigned by § 169.001, Occupations Code.