(A) Every rider who has been engaged to ride in a race shall be physically present in the jockeys' room no later than one hour prior to post time for the first race on the day they are scheduled to ride, unless excused by the stewards, or the clerk of scales and upon arrival shall report to the clerk of scales their engagements. In the event a rider should fail for any reason to arrive in the jockeys' room prior to one hour before post time of a race in which he/she is scheduled to ride, the clerk of scales shall so advise the stewards who thereupon shall name a substitute rider and shall cause announcement to be made of any such rider substitution prior to opening of wagering on such race.
(B) Each rider reporting to the jockeys' room shall remain in the jockeys' room until they have fulfilled all of their riding engagements for the day, except to ride in a race, or except to view the running of a race from a location approved by the stewards. Such riders shall have no contact or communication with any person outside the jockeys' room other than an owner or trainer for whom he/she is riding, or a racing official, until such rider has fulfilled all his/her riding engagements for the day.
(C) Any licensed jockey who has no riding engagements for any given day, will not be permitted in the jockeys' quarters.