At a time designated by the presiding judge, the paddock judge shall cause all horses entered in such heat or dash to be formed in a parade line. Such horses shall be attended by their drivers unless specifically excused by the paddock judge. All horses in heat or race shall parade from the paddock upon the track and before the grandstand not later than 5 minutes before post time. A horse failing to parade without being excused by the judges may be scratched from the race or its driver or trainer may be penalized. Drivers shall not engage in conversation during the post parade.
58 Pa. Code § 183.36