Judicial Review in Canada: What NCA Candidates Need to Know (2026)

What Is Judicial Review?

At its core, judicial review is the mechanism through which courts supervise administrative decision-makers. When a government body — a tribunal, a minister, a regulatory agency, or a professional licensing body — makes a decision, affected parties can ask a court to review that decision. The court does not hear the case afresh. It does not call new witnesses or re-weigh the evidence. Instead, the court examines the legality of the decision: was it made within the decision-maker's statutory authority, did the process comply with the duty of fairness, and was the outcome reasonable or correct (depending on the applicable standard)?

This distinction between judicial review and appeal is critical for NCA exam answers. An appeal involves a higher court reviewing a lower court's decision on the merits and potentially substituting its own judgment. Judicial review is narrower. The reviewing court intervenes only when something has gone wrong with the decision-making process itself or when the outcome falls outside the range of defensible outcomes. If you conflate the two in your exam answer, you signal a fundamental misunderstanding of administrative law.

Who Can Seek Judicial Review: Standing

Not everyone can bring an application for judicial review. The applicant must have standing — a sufficient legal interest in the decision being challenged. Canadian law recognises three categories of standing for judicial review.

• Direct interest standing: The person is directly affected by the administrative decision. This is the most common basis. If a tribunal denies your professional licence, you have direct standing to seek judicial review of that decision.
• Public interest standing: Even if the applicant is not directly affected, courts may grant standing where the case raises a serious justiciable issue, the applicant has a genuine interest in the matter, and there is no other reasonable and effective way to bring the issue before the court. The leading case is Canada (Attorney General) v Downtown Eastside Sex Workers United Against Violence Society, 2012 SCC 45, which adopted a purposive and flexible approach to public interest standing.
• Statutory standing: Some enabling statutes expressly define who may apply for judicial review. Where the statute specifies standing requirements, those requirements govern.

On NCA exams, standing questions usually appear as a preliminary issue. The examiner expects you to identify whether the applicant has standing before proceeding to the merits. Address it briefly but explicitly — do not skip it.

Grounds for Judicial Review

Canadian courts recognise three broad grounds on which an administrative decision may be challenged through judicial review.

1. Illegality

The decision-maker acted outside its statutory authority or misinterpreted the scope of its powers. This includes errors of law — for example, applying the wrong legal test, misinterpreting the enabling statute, or making a decision that the statute does not authorise. Under the Vavilov framework, the standard of review determines how the court assesses the legal error: on a reasonableness standard, the court asks whether the interpretation is defensible; on a correctness standard, the court determines whether it is right.

2. Procedural Unfairness

The decision-maker failed to comply with the duty of fairness. This ground engages the Baker factors: the nature of the decision, the statutory scheme, the importance of the decision to the individual, the legitimate expectations of the applicant, and the procedural choices of the decision-maker. Common procedural fairness breaches include failure to provide adequate notice, denial of an opportunity to be heard, reasonable apprehension of bias, and failure to provide reasons. Procedural fairness is assessed on its own terms — the Vavilov standard of review framework does not apply to procedural fairness challenges.

3. Unreasonableness

The decision itself — its substance, reasoning, or outcome — is unreasonable. Under Vavilov, a reasonable decision must exhibit justification, transparency, and intelligibility and must be justified in relation to the relevant factual and legal constraints (Vavilov, para 99). The court examines whether the reasoning contains logical flaws, whether the decision-maker failed to account for binding constraints, or whether the outcome falls outside the range of possible, acceptable outcomes. This is the ground most frequently tested on NCA exams, and it requires a thorough understanding of the Vavilov standard of review framework.

Standard of Review: The Vavilov Framework

The standard of review determines the intensity of the court's scrutiny. Under the Vavilov framework, the presumptive standard is reasonableness. The court does not ask whether the decision was correct — it asks whether it was reasonable. This presumption is rebutted in five situations where correctness review applies: where the legislature has expressly prescribed a standard, where there is a statutory right of appeal, where the question involves constitutional division of powers, where the question is one of central importance to the legal system as a whole, and where the question involves jurisdictional boundaries between administrative bodies.

For a detailed breakdown of each exception and how to apply the Vavilov framework in your NCA exam answer, see our comprehensive guide: Vavilov Standard of Review Explained for NCA Candidates.

Statutory Appeal vs Judicial Review

Many enabling statutes provide a right of appeal from an administrative decision to a court. This is different from judicial review. When a statutory appeal exists, the appellate standards from Housen v Nikolaisen, 2002 SCC 33 apply: questions of law are reviewed on a correctness standard, questions of fact on a palpable and overriding error standard. Where a statute provides a right of appeal, the applicant should generally use it rather than seeking judicial review — courts will often refuse to grant judicial review where an adequate alternative remedy (the statutory appeal) exists.

On the NCA exam, watch for whether the hypothetical statute includes an appeal provision. If it does, the entire standard of review analysis changes. This is one of the five Vavilov exceptions, and missing it is a significant error that costs marks.

Remedies Available on Judicial Review

If the court finds that the administrative decision was unlawful, it has several remedies available. These are the prerogative remedies inherited from English common law, supplemented by statutory remedies.

• Certiorari: Quashes (nullifies) the decision. This is the most common remedy. The court declares the decision void and typically sends the matter back to the decision-maker for reconsideration.
• Mandamus: Compels the decision-maker to perform a public duty that it has failed or refused to perform. Used when a tribunal has jurisdiction but refuses to exercise it.
• Prohibition: Prevents the decision-maker from acting beyond its jurisdiction or from continuing to act unlawfully. It is forward-looking — it stops future unlawful action.
• Declaratory relief: The court declares the legal rights of the parties or the correct interpretation of the law without quashing the decision or compelling action. Useful where the applicant seeks clarity rather than a specific order.
• Injunction: A court order requiring the decision-maker to do or refrain from doing something. May be granted on an interim basis to preserve the status quo while the judicial review application is heard.

In your NCA exam answer, always specify which remedy the applicant should seek. Examiners award marks for identifying the appropriate remedy and explaining why it fits the facts. Do not simply say "the decision should be overturned" — name the specific prerogative remedy.

How Judicial Review Appears on the NCA Exam

Judicial review questions on the NCA Administrative Law exam typically present a hypothetical administrative decision and ask you to advise the applicant. The strongest answers follow a structured approach: first, confirm that judicial review (not a statutory appeal) is the appropriate proceeding; second, establish standing; third, identify the applicable standard of review using the Vavilov framework; fourth, apply the standard to the facts and identify the specific ground of review (illegality, procedural unfairness, or unreasonableness); and fifth, specify the appropriate remedy.

The most common mistake is jumping straight to the merits without addressing the preliminary issues. Examiners want to see that you understand the architecture of judicial review — not just the substance. Treat each step as a separate paragraph in your answer. This structure demonstrates command of the material and makes it easy for the examiner to award marks at each stage.

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