01-017-7 Me. Code R. § 58
It is a violation of these rules to interfere with another horse or other horses. An offending horse shall be set back for interference if the outcome of the race is affected by that interference. If a horse is set back for interference, he or she must be placed behind the horse or horses he or she interfered with. If the progress of the other horses has been impeded, the offending horse may be placed behind all the non-offending horses adversely affected by the interference in that heat or dash. In the event the interference prevents any horse from finishing the heat or dash, the offending horse may be disqualified from receiving any winnings and the driver may be suspended or fined. If, in the opinion of the Judges, the interference did not affect the outcome of the race, the driver may be penalized even if no placings or disqualification was made.
01-017 C.M.R. ch. 7, § 58