01-017-7 Me. Code R. § 51
Horses must be in the paddock at a time prescribed by the Presiding Judge, but in any event at least one hour prior to post time of the race in which the horse is to compete. The Presiding Judge may ask any trainer whose horse is scheduled to compete on a race day, be in the paddock longer than one hour prior to post time. With less than one hour prior to post, except for warm-up trips, no horse shall leave the paddock until called to post. On those occasions when pre-race testing is conducted, no horse shall warm-up until granted permission by the State Steward or his or her designee. All horses must report to the paddock prior to warm up. No horse may leave after completing a race until the Judges announce which horses have been selected for testing. Failure to comply with this section may result in disqualification or a penalty.
01-017 C.M.R. ch. 7, § 51