(a) It is an unfair method of competition or an unfair or deceptive act or practice in the business of discount health care programs for a discount health care program operator or an affiliate or agent of a discount health care program operator to require a pharmacy or pharmacist to:
(1) participate in a specified provider network as a condition of processing a claim for prescription drugs under the discount health care program; or
(2) participate in, or process claims under, a discount health care program as a condition of participation in a provider network.
(b) A discount health care program operator is not legally liable for any act or omission of an agent of the operator in violation of Subsection (a).