Cal. Business and Professions Code § 19582.5

The board may adopt regulations that prohibit the entry in a race of a horse that tests positive for a drug substance in violation of Section 19581. Upon a finding of a prohibited drug substance in an official test sample, a horse may be summarily disqualified from the race in connection with which the drug sample was taken. Upon the disqualification of a horse pursuant to these regulations, any purse, prize, award, or record for that race shall be forfeited. However, the board, including its hearing officers and stewards, shall have the authority to order, in the interests of justice, that a jockey be permitted to keep his or her share of the purse, prize, or award for that race upon a finding that a person, other than the jockey, willfully, and with flagrant disregard for recommended veterinary practice and the regulations of the board, administered the prohibited substance. Such an order may provide that the jockey’s share of the purse, prize, or award shall be paid by the person or persons determined to be responsible for willfully administering the prohibited substance.