C-72.1, r. 4 - Rules respecting Standardbred horse races held at a professional race track

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224. The association shall establish in the conditions for participation the deadline by which the trainer of a horse shall give the name of the driver who will drive the horse; where the trainer fails to do so, the association shall appoint a driver. No one may be substituted for that driver without the permission of the racing judges.
Decision 90-09-19, s. 224.