California Code, Business and Professions Code - BPC § 4990.20

(1) That the articles of incorporation or bylaws of a marriage and family therapist corporation, a licensed clinical social worker corporation, or a professional clinical counselor corporation include a provision whereby the capital stock of that corporation owned by a disqualified person, as defined in the Moscone-Knox Professional Corporation Act (Part 4 (commencing with Section 13400) of Division 3 of Title 1 of the Corporations Code), or a deceased person shall be sold to the corporation or to the remaining shareholders of that corporation within the time that the rules and regulations may provide.

(2) That a marriage and family therapist corporation, a licensed clinical social worker corporation, or a professional clinical counselor corporation shall provide adequate security by insurance or otherwise for claims against it by its patients arising out of the rendering of professional services.