Singapore Judicial Review: Order 24, Prerogative Orders, Public-Law Grounds & Procedure 2026

Rule Source

Rules of Court 2021, Order 24

Commencement

ROC 2021 came into operation on 1 April 2022 and generally applies to proceedings commenced on or after that date, subject to the transitional rules.

Scope

Order 24 applies to the Supreme Court.

Prerogative Orders

• Order for Review of Detention
• Mandatory Order
• Prohibiting Order
• Quashing Order

Ordinary Judicial Review Orders

For ordinary administrative judicial review, the relevant prerogative orders are the Mandatory Order, Prohibiting Order and Quashing Order. An Order for Review of Detention is governed separately by Order 24 rules 3 and 4.

Permission

Order 24 rule 5 requires permission before an application for a Mandatory, Prohibiting or Quashing Order can be made.

Alternative Remedy

Order 24 rule 2(2) expressly states that an application for a prerogative order must not be made before the applicant has exhausted any right of appeal or other remedy provided under written law.

Time Limit

Subject to written law, permission must generally be sought within 3 months after the omission, judgment, order, conviction or proceedings giving rise to the application.

Open Court

Applications for Mandatory, Prohibiting and Quashing Orders under Order 24 rule 6 are among the applications directed to be heard in open court under the Supreme Court Practice Directions.

Current Version

Singapore Statutes Online shows the Rules of Court 2021 as amended and current as at August 2026.

Requirements

• The subject matter of the complaint must be susceptible to judicial review.
• The applicant must have sufficient interest in the matter.
• The material must disclose an arguable or prima facie case of reasonable suspicion in favour of granting the remedies sought.

Purpose

The permission stage filters out groundless or hopeless applications at an early stage and prevents unnecessary expenditure of judicial and public resources.

Evidence

The applicant ordinarily relies on the originating application, supporting statement/material and affidavit or other evidence required by the Rules and practice directions.

Threshold

The threshold is not a full merits hearing. The Court generally asks whether the applicant has crossed the permission threshold rather than finally deciding every disputed factual or legal issue.

Not Automatic Leave

Showing that a public authority made a decision does not itself establish a right to judicial review or guarantee permission.

Constitutional Claims

Where a constitutional right is directly implicated, the sufficient-interest analysis can operate differently, but the applicant must still establish a real controversy and satisfy the other permission requirements.

Sufficient Interest

Singapore judicial-review law requires sufficient interest. The analysis is context-specific and is not satisfied merely because an applicant is a concerned citizen or disagrees with Government policy.

Real Controversy

The courts have emphasised that there must be a real controversy between the parties rather than an abstract or hypothetical question for an advisory opinion.

Public Law Nature

The challenged act or decision must be susceptible to public-law judicial review. Private contractual disputes do not automatically become public-law claims because a public body is involved.

Public Authority

Judicial review commonly concerns Ministers, statutory boards, regulators, tribunals, licensing authorities and other bodies exercising public powers, but the true question is the legal nature of the power and decision.

Constitutional Review

A constitutional challenge may arise within judicial review where the challenged act or law engages the Constitution, but the precise route and relief depend on the constitutional provision and circumstances.

Illegality

Irrationality

Procedural Fairness

Legitimate Expectation

Unconstitutionality

Quashing Order

Mandatory Order

Prohibiting Order

Order For Review Of Detention

Declaration

Three Month Rule

Order 24 rule 5(2), subject to written law, requires an application for permission to apply for a Mandatory Order, Prohibiting Order or Quashing Order to be made within 3 months after the date of the omission, judgment, order, conviction or proceedings which gave rise to the application.

Not Always Decision Date

The legal trigger is broader than 'date of decision'. The correct date must be identified from the event giving rise to the application.

Extension

The current ROC 2021 wording is subject to written law. An applicant should not assume that the Court has an unrestricted general power to extend the 3-month period merely by citing delay being excusable.

Reasonable Urgency

Even where the formal 3-month rule does not apply to a particular remedy in the same way, delay can be relevant to whether discretionary relief should be granted.

Remedy Specific

The timing rules differ depending on whether the applicant seeks a Quashing Order, Mandatory Order, Prohibiting Order, declaration or another form of public-law relief and on any applicable written law.

Order24 Rule2

The applicant must not make an application for a prerogative order before exhausting any right of appeal or other remedy provided under written law.

Purpose

Judicial review is generally supervisory rather than a substitute for an appeal mechanism Parliament has created.

Adequacy

Whether an alternative remedy must be pursued and whether it is adequate can depend on the statutory framework and the nature of the complaint.

Example

The 2026 High Court decision in Commersol Commodities Pte Ltd v Comptroller of Goods and Services Tax treated the statutory GST appeal route to the Board of Review as relevant to the permission application under Order 24 rule 2(2).

Urgent Situations

The availability of an alternative remedy does not mean every judicial-review application is impossible in every circumstance; the exact interaction must be analysed under the written law and case law.

Stage1 Permission

The applicant seeks permission to apply for a Mandatory, Prohibiting or Quashing Order within the Order 24 time limit.

Permission Material

The applicant must provide the material required by Order 24 and the Supreme Court Practice Directions to enable the Court to assess susceptibility to review, sufficient interest and an arguable or prima facie case of reasonable suspicion.

Stage2 Substantive Application

If permission is granted, the substantive application for the relevant prerogative order proceeds under Order 24 rule 6 and the applicable case-management and service rules.

Respondent And Government

The proper respondent depends on the challenged decision. The Attorney-General may be involved in proceedings concerning Government decisions under the applicable procedural framework, but AGC should not be described as the mandatory representative in every judicial-review case.

Hearing

Applications under Order 24 rule 6 for Mandatory, Prohibiting or Quashing Orders are directed to be heard in open court under the Supreme Court Practice Directions.

Evidence

Affidavits and other materials establish the facts relevant to the public-law challenge. The Court's permission stage is not ordinarily a full trial of every factual dispute.

Relief

If the substantive application succeeds, the Court may grant the appropriate prerogative order and any permissible ancillary or consequential declaration or relief.

Appeal

A dissatisfied party may have an appeal route to the Court of Appeal under the applicable Rules of Court and legislation. An appeal is not automatically a rehearing of every administrative fact or policy issue.

General Division

The General Division of the High Court is the normal first-instance court for applications for Mandatory, Prohibiting and Quashing Orders under Order 24.

Court Of Appeal

The Court of Appeal is Singapore's apex appellate court and may hear appeals from the High Court where the applicable jurisdiction and permission or procedural requirements are satisfied.

Appellate Finality

A Court of Appeal decision is generally final within the ordinary judicial hierarchy, but the legal effect and any exceptional further procedure must be assessed under the governing legislation and Rules of Court.

Not State Courts

Ordinary Order 24 prerogative-order applications are Supreme Court proceedings rather than proceedings in the State Courts.

Permission Cases

• Gobi a/l Avedian v Attorney-General [2020] SGCA 77
• Qureshi Mohamed Aslam v Majlis Ugama Islam, Singapura [2026] SGCA 19

Recent2026 Case

Qureshi Mohamed Aslam v Majlis Ugama Islam, Singapura [2026] SGCA 19 reaffirmed the three permission requirements: susceptibility to judicial review, sufficient interest and an arguable or prima facie case of reasonable suspicion.

Alternative Remedy Case

Commersol Commodities Pte Ltd v Comptroller of Goods and Services Tax [2026] SGHC 101 applied Order 24 rule 2(2) to an applicant who had not exhausted the statutory GST appeal mechanism.

Time Limit Case

A 2026 High Court decision, Ong Cheng Cheng v Attorney-General [2026] SGHC 130, applied the current Order 24 rule 5(2) three-month limit and considered an application filed approximately 19 months after the relevant time had expired.

Ground Cases

• Muhammad Ridzuan bin Mohd Ali v Attorney-General [2015] 5 SLR 1222
• Gobi a/l Avedian v Attorney-General [2020] SGCA 77
• Syed Suhail bin Syed Zin v Attorney-General [2021] 1 SLR 809
• Han Hui Hui v Attorney-General [2022] SGHC 141

Case Law Caveat

The precise scope and threshold of each judicial-review ground develops through the cases. A content page should avoid presenting Wednesbury, natural justice, legitimate expectation or proportionality as if one universal formula applies to every public-law challenge.