Cal. Code Regs. tit. 4 § 1559
The clerk of scales shall verify the correct weight of each jockey at the time of weighing out and when weighing in, and he shall report any discrepancies to the stewards immediately. The clerk of scales shall notify the stewards of any change of jockeys, or of any extra or special weight declared for any horse, or any overweight, or any alteration of colors. At the close of each day's racing the clerk of scales shall provide the association with a report of the weight carried in every race and the names of the jockeys specifying overweight, if any. He shall provide the paymaster of purses an accounting of the riding fees due each jockey at the end of each racing day. The Clerk of Scales shall be responsible to the stewards for the conduct of the jockeys and their attendants in the jockey room.
Cal. Code Regs. Tit. 4, § 1559