In Guilbeault v. Williams (Ont Div Ct, 2026) the Ontario Divisional Court considers the meaning of the 'correctness' standard of review for questions of law:
[10] There is no dispute about the standard of review on an appeal to this court. An appeal is brought pursuant to s. 210 of the Act and is available only on a “question of law”. The appellate standard of review on a question of law is correctness. See Minister of Citizenship and Immigration v. Vavilov, 2019 SCC 65, [2019] 4 SCR 653. A correctness standard means that the court is free to substitute its own interpretation of the law if it finds that the tribunal is in error but it does not mean that the court should be blind to the specialized expertise exercised by a tribunal in interpreting its home statute. The court can be assisted by the analysis conducted by the tribunal when determining if there is an error of law. See Reisher v. Westdale Properties, 2023 ONSC 1817 (Div Ct.).
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