If in the opinion of the Presiding Judge a driver is unfit or incompetent to drive for any reason or refuses to comply with the directions of the Judges or is otherwise reckless in conduct and endangers the safety of horses or other drivers in the race, the driver may be removed and another driver substituted at any time after the positions have been assigned in the race and the offending driver shall be penalized.
7 Pa. Code § 205.406