In case of a recall, a light plainly visible to the driver shall be flashed and a recall sounded but the starting gate shall proceed out of the path of the horses. Whenever possible the Starter shall leave the wings of the gate extended and gradually slow the speed of the gate to assist in stopping the field of horses. In emergencies, however, Starters shall use their discretion to close the wings of the gate.
7 Pa. Code § 205.376