"This is particularly so because, unlikely as it is, if the public found out a jockey was not betting money on a jockey's own horse there would be an impact on betting markets and integrity questions raised. It is however a less serious activity than betting on another jockey's mount."
Armati also said the 25 per cent discount on the mandatory two-year penalty afforded McDonald was adequate and made mention of the amount of time it took the jockey to come clean to stewards about the $1000 bet placed on his behalf by professional punter Anthony Gardiner.
Stewards had been aware of McDonald's association with Gardiner who has been warned off after failing to appear for questioning.
McDonald, who lost his retainer with global racing power Godolphin, can return to riding in May 2018.