California Code, Business and Professions Code - BPC § 19610.2

Every association that conducts a racing meeting shall deduct one-tenth of 1 percent of the total amount handled.  From the amount deducted on wagers made on-track, thirty-three one hundredths of the amount deducted shall be distributed to the Center for Equine Health and shall supplement, and not supplant, other funding sources.  Sixty-seven one hundredths of the amount deducted shall be distributed to the California Animal Health and Food Safety Laboratory to fund the equine drug testing program and laboratory at the University of California, Davis described in Section 19578.