(a) A jockey engaged to ride in a race must report to the clerk of scales for weighing-out not more than 30 minutes before post time for the first race, if the jockey is riding in that race, and not sooner than the running of the preceding race, if the jockey is riding in any other race.(b) The clerk of scales shall have the overweight or change of jockeys posted immediately and announced over the public address system.(c) A jockey who weighs out more than seven pounds above the appropriate weight shall be taken off the mount.