California Code, Business and Professions Code - BPC § 19613.6

Notwithstanding any other provision of this chapter, the owners' organization referred to in subdivision (a) of Section 19613.2 that represents thoroughbred owners may elect to contribute the purses from one race conducted annually by each licensed thoroughbred racing association or fair to a welfare fund. The contribution shall be used for the benefit of horsemen, and the trainers' organization shall make an accounting to the board within one calendar year of the receipt of the contribution. The designation of a specific race from which the horsemen elect to contribute the purses is subject to the mutual agreement of the horsemen's organization and the racing association or fair that conducts the race.