01-017-7 Me. Code R. § 39
The following provisions apply when starting a race without a gate. The horses shall be allowed two warm-up scores, unless otherwise directed by the Starter/Patrol Judge, before being called to formation. The Starter/Patrol Judge shall have full control of the horses from the time the formation is complete until the word "Go" is given. The Starter/Patrol Judge shall be stationed at or near the starting point and shall give the word "Go" as close as possible to such starting or release point. All drivers shall follow the instructions of the Starter/Patrol Judge as closely as possible and shall avoid unnecessary delay in formation. If the word "Go" is not given, all the horses in the race shall immediately return to their formation positions for a fresh start. There shall be no recall after the word "Go" has been given.
01-017 C.M.R. ch. 7, § 39