In case of interference, collision or violation of this part, the offending horse may be placed behind the unoffending horses in the heat or dash, and in the event the collision or interference prevents a horse from finishing the heat or dash, the offending horse may be disqualified from any winnings and the driver may be penalized. In the event a horse is set back under this section he shall be placed behind the horses with whom he interfered.
58 Pa. Code § 183.284
This section cited in 58 Pa. Code § 183.289 (relating to use of goading devices and the like).