http://www.chrb.ca.gov/policies_and_...ules6-2006.pdf

"1971. Wagering by Jockey or Driver.

"No jockeys or drivers shall make any wagers, or have any wagers made in their behalf, in any race in which they participate, except through the owners or trainers on the horses which they ride or drive.
Any owners or trainers wagering for such jockeys or drivers shall maintain records of all such wagers and all other presents or other gratuities given any jockeys or drivers. Such records will be furnished to the stewards or the Board or its investigators upon demand.