California Code, Business and Professions Code - BPC § 18897.47

No athlete agent shall divide fees with or receive compensation from a professional sports league, team, or other organization or its representatives or employees, if the fees or compensation are directly related to on-field activities of athletes or other representation of the league, team, or organization as it directly relates to the employment of athletes. In addition, no athlete agent shall offer or allow any full-time employee of a union or players' association connected with professional sports to own or participate in any of the revenues of the athlete agent.