Cal. Bus. & Prof. Code § 19618

(a) Except as provided in Article 9.2 (commencing with Section 19605), no person licensed under this chapter to conduct a racing meeting shall pay or distribute to, or on behalf of, any horse owner, any agent, or person or organization representing any horse owner or owners, purses, or any other type of consideration to, or for, the benefit of horsemen, other than that expressly provided in this chapter.
(b) Except as provided in Article 9.2 (commencing with Section 19605), no horse owner, any agent, or person or organization representing any horse owner or owners, shall receive, solicit, or obtain from any person licensed under this chapter to conduct a race meeting, purses, or any other type of consideration to, or for, the benefit of horsemen, other than that expressly provided in this chapter.
(c) No plaque, cup, tray, ribbon, trophy, or similar award given in recognition of achievement or special event is deemed to be consideration for the purpose of subdivisions (a) and (b).
(d) Subdivisions (a) and (b) do not apply to any payment by an association in connection with any match race or special racing event.
(e) Notwithstanding subdivision (a) or (b), or any other provision of law, the horsemen’s organization that represents the horsemen participating in a racing meeting and a licensed racing association may enter into an agreement which provides for the division of, and sharing by the organization and the association of, the interest earned on the association’s paymaster accounts during racing meetings conducted prior to, during, or subsequent to, 1990, if both of the following conditions are satisfied:
1. (1) The agreement is filed with the board.
2. (2) The share of earned interest allocated to the horsemen’s organization is used exclusively for the benefit of horsemen, including, among other purposes, purses.
(f) Notwithstanding subdivision (a) or (b), or any other provision of law, the horsemen’s organization that represents the horsemen participating in a racing meeting and a licensed racing association may enter into an agreement that provides for the supplementing of purses due to the impact, if any, of activities regulated pursuant to the provisions of Chapter 5 (commencing with Section 19800) that are conducted on the association’s property during a race meeting, if both of the following conditions are satisfied:
1. (1) The agreement is approved by the board.
2. (2) Any sum agreed to pursuant to this subdivision is used exclusively to supplement purses.