Cal. Pub. Res. Code § 42981
(a) Except as provided in subdivision (b), any action by a carpet stewardship organization or its members that relates to any of the following is not a violation of the Cartwright Act (Chapter 2 (commencing with Section 16700) of Part 2 of Division 7 of the Business and Professions Code), the Unfair Practices Act (Chapter 4 (commencing with Section 17000) of Part 2 of Division 7 of the Business and Professions Code), or the Unfair Competition Law (Chapter 5 (commencing with Section 17200) of Part 2 of Division 7 of the Business and Professions Code):
(b) Subdivision (a) does not apply to an agreement that does any of the following: