(a) A contract between an insurer and a repair person or facility, including an agreement under which the repair person or facility agrees to extend discounts for parts or labor to the insurer in exchange for referrals by the insurer, may not result in a reduction of coverage under an insured's automobile insurance policy.
(b) The commissioner may adopt rules under Chapter 542 with respect to any fraudulent activity of any party to an agreement described by Subsection (a).