The Ontario Court of Appeal has replaced a 50-year-old legal framework governing appeals from the Divisional Court, introducing a new two-part test for granting leave to appeal. The change stems from Knauff v. Ontario (Human Rights Tribunal), 2026 ONCA 653, a decision by a five-judge panel that modernizes the criteria for such appeals.
Until now, the Re Sault Dock Co. Ltd. and City of Sault Ste. Marie (1973) precedent has governed leave applications. The court’s updated framework now requires parties to demonstrate both arguability and public importance. Arguability asks whether a real, debatable question of law or mixed law and fact exists between the parties, without requiring a prediction of success. Public importance assesses two factors: the breadth of those affected and the significance for Ontario law’s development.
Eliminating Old Distinctions
The court eliminated the previous distinction between appeals from the Divisional Court’s original jurisdiction (judicial reviews) and appellate jurisdiction (tribunal appeals). The same test now applies regardless of how the case reached the Divisional Court. The old residual categories-“special circumstances” and “clear errors”-are now folded into the public importance analysis rather than treated as separate grounds.
Interlocutory orders also no longer require an additional hurdle showing they could affect a critical issue. The effect—decisive or transitory—is now just one factor in the overall assessment.
Resolving Uncertainty
The shift followed conflicting rulings by different Court of Appeal panels in 2024. In West Whitby Landowners Group Inc. v. Elexicon Energy Inc., 2024 ONCA 910, a three-judge panel criticized the Sault Dock framework for being applied too rigidly and disconnected from modern legal developments. Another panel in Davis v. Aviva General Insurance Company, 2024 ONCA 944, countered that only a five-judge panel could revise the test.
That uncertainty prompted Adam Knauff to seek reconsideration of Sault Dock. Justice Benjamin Zarnett, writing for the court, maintained the core principle, leave hinges on arguability and public importance, but clarified the framework significantly.
Under the new approach, a party must first show an arguable question applies to their specific case. Challenges to discretionary decisions, fact-specific applications of settled law, or issues never argued below may fail this threshold. Public importance then evaluates whether the question affects a broad class of people, involves fundamental interests, or impacts Ontario law’s coherence and progress.
Formerly, appeals from tribunal decisions, such as those from the Human Rights Tribunal of Ontario or the Ontario Special Education Tribunal, were treated as “exceptional” with a heightened standard. Tribunals’ decisions and Divisional Court rulings now operate under the same test, regardless of origin.
The court dismissed Knauff’s leave application, finding his challenge to a discretionary mootness decision lacked both arguability and public importance. The ruling does not lower the bar for appeals but offers a clearer, more consistent framework for litigants following the post-Divisional Court path to the Court of Appeal.
The Arguability Filter
The court emphasized that arguability serves as a strict gatekeeping requirement. A party must present a genuine legal question applicable to their specific case, not merely a hypothetical or abstract issue. Challenges that rely on factual disputes, re-litigating settled matters, or targeting discretionary decisions without clear legal errors will likely fail at this stage.
This threshold ensures only substantive legal issues advance, preventing the Court of Appeal from becoming a forum for rehearsing factual determinations or routine applications of existing law. The focus remains on questions that are both debatable and tied to the particulars of the case before the court.
Impact on Tribunal Appeals
The removal of the “exceptional” classification for tribunal decisions standardizes the appeal process across all Divisional Court jurisdictions. Previously, appeals from bodies like the Human Rights Tribunal of Ontario or the Ontario Special Education Tribunal faced heightened scrutiny. Now, these cases follow the same two-part test as judicial reviews or other appeals.
The court’s decision in Knauff itself illustrates this balance. While the framework is more accessible, it does not lower the substantive bar.
The uniform application of the two-part test across all Divisional Court appeals eliminates earlier inconsistencies. Whether a party seeks judicial review of a tribunal’s decision or an appeal from a statutory hearing, the criteria for reaching the Court of Appeal now rest on the same foundation.
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