What is the standard of review for a decision of an arbitrator?

MTCC, on the other hand, relies on the decision of Justice Perell in Toronto Standard Condominium Corporation No. 2256 v. Paluszkiewicz, 2018 ONSC 2329, at para. 74, and states that the standard of review for decisions of arbitrators is the reasonableness standard on questions of fact, questions of mixed fact and law and questions of law, unless the question of law is a general question of law that transcends the specific regime or that is both of central importance to the legal system as a whole and also outside the adjudicator’s specialized area of expertise. However, Justice Perell did not set out the standard of review applicable in that case.