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The Australian Government Solicitor

Sir Harry Gibbs Constitutional Law Moot 2026

10th to 12th October

Registrations Close - September 12

Guidance, FAQs & Resources

The ANU Law Students' Society, in conjunction with the Australian Association of Constitutional Law, is proud to host the 2026 Sir Harry Gibbs Constitutional Law Moot, Australia’s leading national constitutional law mooting competition for university students.

Since its inception in 2002, the Gibbs Moot has earned a reputation as a premier forum for aspiring advocates to grapple with complex and often topical questions of constitutional law.

Each year, the competition challenges participants to prepare written and oral submissions on a hypothetical case grounded in live constitutional issues. Many moot problems have been crafted by current and former High Court Justices and Solicitors-General, ensuring the moot’s continued rigour and relevance. This year, the current Solicitor General, Dr Stephen Donaghue KC, has once again kindly agreed to draft the problem question.

Named in honour of Sir Harry Talbot Gibbs GCMG AC KBE QC, who served as a Justice of the High Court of Australia from 1970 and as Chief Justice from 1981 to 1987, the moot continues to celebrate his enduring legacy in Australian constitutional jurisprudence.

A thank you to our sponsor

The ANU Law Students’ Society is proud to partner with the Australian Government Solicitor (AGS) to present the 2026 Sir Harry Gibbs Constitutional Law Moot – Australia’s premier constitutional law competition.

As the Australian Government’s central legal service, AGS is a centre of excellence and expertise in areas of law of importance to the Commonwealth.

AGS lawyers are specialists in constitutional and public law, statutory interpretation and the development, implementation and administration of legislation. As well as providing constitutional advice, AGS acts for the Commonwealth in constitutional litigation and coordinates the conduct of other cases involving constitutional issues.

With offices in every capital city, and a large legal practice that covers some 40 different areas of law related to government, AGS is one of Australia's largest national legal services providers.

Learn more about working at AGS, including the Graduate Program, by visiting the careers page on the AGS website.

We thank AGS for their generous support in making this year’s competition possible.

2026 Problem

The 2026 Problem here on the 1 September 2026.

In the meantime, students can review last year's problem and the accompanying clarifications, below.

Sir Harry Gibbs Constitutional Law Moot Problem 2025

Competition Schedule & Rules

Tuesday 1 September

12:00pm - Problem Release

Tuesday 8 September

11:59pm - Clarifications due to submissions@gibbsanu.com

Saturday 3rd October

11:59pm - Submissions due to submissions@gibbsanu.com

Sunday 4 October

12pm - Opposing counsel submissions release

Friday 9th October

5:00 pm - Competitor Induction, Online, https://meet.google.com/ujy-whfa-foh

6:00 pm - Welcome Drinks & Opening Ceremony, Badger&Co, Health & Well-being Centre, 156-11, Joplin Lane, Kambri Precinct

Saturday 10th October

10am - 12am - Preliminary Round 1, Building 6A, ANU College of Law, 5 Fellows Rd, Acton

4pm - 6pm - Preliminary Round 2

Sunday 11th October

9am - 11am - Preliminary Round 3, Building 6A, ANU College of Law, 5 Fellows Rd, Acton

1pm - 3pm - Preliminary Round 4

6:30pm - 8:30pm - Quarter Finals

Monday 13th October

10am - 12pm - Semi Finals - Building 6A, ANU College of Law, 5 Fellows Rd, Acton

5pm - 7pm - Grand Finals - High Court of Australia

7:30pm - Gala Dinner

Competition Rules

News & Updates

Check here for regular updates

Previous Editions of the Gibbs Moot

2025’ Edition

In response to tragic drug overdoses at music festivals, Parliament has enacted the Drug Enforcement at Territory Events and Raves Act 2025 (DETER Act), granting police sweeping search powers at Territory music events. Senator Ronald Swanson - a vocal opponent of the legislation who later became Environment Minister - attended a festival and refused police demands to hand over his phone during a search. After being subjected to a strip search, Senator Swanson walked away from the scene and was subsequently convicted under the Act, though he received only a good behaviour bond.

The Opposition-controlled Senate has declared his seat vacant due to the criminal conviction, but the Government disputes this determination, maintaining Senator Swanson's legitimacy as both Senator and Minister. Sir Andrew Dwyer has challenged an environmental decision made by Senator Swanson, arguing the Minister lacked valid authority to act.

The High Court must now determine whether the DETER Act violates the separation of powers under Chapter III of the Constitution, whether the Court can review Parliament's own vacancy determinations, and whether Senator Swanson's parliamentary seat truly became vacant.

The problem question was drafted by the Solicitor-General of Australia, Dr Stephen Donaghue KC.

The Moot was hosted by the ANU Law Students’ Society.

The University of Queensland (Leon Natus, Bianca Leathers, Charlie Hoare, Advitya Arora, William Simmons [Coach]) won the Grand Final.

2024’ Edition

The New South Wales Parliament has enacted the War on Waste Act, requiring households to install Methane Monitors in rubbish bins and pay a levy of 10 cents per gram of methane produced by domestic food waste. Logan Roy, a Sydney resident, refuses to comply, resulting in a $3,800 levy and a subsequent $5,000 “Do the Right Thing” notice from the Commonwealth’s Waste Advisory Agency, established under its own federal Act to support compliance. Roy challenges the laws in the High Court, raising two constitutional questions: whether the NSW levy is an invalid duty of excise under s 90, and whether the federal Agency exercises judicial power contrary to Chapter III of the Constitution.

The problem question was drafted by the Solicitor-General of Australia, Dr Stephen Donaghue KC.

The Moot was hosted by Melbourne University and the Melbourne University Law Students’ Society.

The University of Technology Sydney (Grace Strik, Gina Tran, and Ryan Little) won the Grand Final.

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Guidance, FAQs & Resources