Philip C. Jessup Moot Court Competition

1.1 History and Global Significance

The Philip C. Jessup International Law Moot Court Competition was founded in 1960 by the International Law Students Association (ILSA) and named after Judge Philip C. Jessup — a distinguished American jurist and former judge of the International Court of Justice. Over six decades, Jessup has grown from a modest American law school exercise into the world’s largest moot court competition, with law schools from over 100 countries and hundreds of teams competing annually.

Jessup simulates proceedings before the International Court of Justice (ICJ), the principal judicial organ of the United Nations. Each year, ILSA releases a new compromis — a fictional treaty clause granting the ICJ jurisdiction — presenting two to four complex questions of public international law for teams to argue from both sides.

1.2 Why Jessup is the World’s Most Prestigious Moot Court

• Scale: More participating law schools and countries than any other moot court competition globally.
• Subject Matter: Live, contested questions of public international law — precisely the issues argued before real international tribunals.
• Dual Submission: Teams must write memorials for both Applicant and Respondent, requiring mastery of opposing legal arguments simultaneously.
• Institutional Legitimacy: Modelled on actual ICJ procedure; judges include international law practitioners, academics, arbitrators, and former diplomats.
• Global Visibility: Winning teams gain international recognition; alumni fill the ranks of international law firms, the UN, and the ICJ itself.

1.3 Skills Developed Through Jessup

1.4 Jessup vs. Other Moot Court Competitions

2.1 Applicant vs. Respondent Structure

In every Jessup round, one team argues as the State of Applicant and the other as the State of Respondent. Critically, Jessup requires each team to prepare full memorials for both sides and be ready to argue either position at oral rounds. This dual-preparation requirement is a hallmark of Jessup’s rigour — a team that truly understands the case constructs the Respondent’s arguments while writing the Applicant’s memorial, and vice versa.

2.2 Competition Timeline

2.3 ICJ Format — Oral Round Structure

• Each round involves two teams of two to four speakers per side.
• Each side has 45–60 minutes total, shared among its advocates.
• Judges may interrupt at any point with questions — this is expected and welcomed.
• At the conclusion of main arguments, each side has 5 minutes for rebuttal.
• The Respondent may deliver a sur-rebuttal in response to the Applicant’s rebuttal.
• Judges score each speaker individually on separate scoring sheets.

3.1 The Three-Read Framework

3.2 Issue Trees and Argument Frameworks

An issue tree maps your legal arguments hierarchically. Construct one for both sides before writing the memorial:

4.1 Sources of International Law — Article 38(1) ICJ Statute

4.2 Treaty Interpretation — VCLT Articles 31–33

• Article 31 (General Rule): Interpret in good faith, with ordinary meaning, in context, in light of object and purpose.
• Article 32 (Supplementary Means): Travaux préparatoires and circumstances of conclusion — only when ordinary meaning is ambiguous or leads to absurd results.
• Article 33 (Multi-lingual Treaties): Where texts differ, use the meaning that best reconciles the authentic texts.

4.3 Customary International Law — The Two Elements

4.4 State Responsibility — ARSIWA Key Provisions

• Article 1: Every internationally wrongful act entails international responsibility.
• Article 2: Wrongful act = attribution to the state + breach of an international obligation.
• Articles 4–11: Attribution — organs of state, persons exercising governmental authority, insurrectionists, acknowledged conduct.
• Articles 20–27: Circumstances precluding wrongfulness — consent, self-defence, countermeasures, force majeure, distress, necessity.
• Articles 34–39: Reparation — restitution, compensation, and satisfaction.

4.5 Key Substantive Areas

5.1 Research Hierarchy

• Binding treaty provisions applicable to both fictional states
• ICJ and PCIJ judgments and advisory opinions
• Other binding judicial / arbitral decisions (ITLOS, ICC, ECtHR)
• ILC Articles and commentaries (reflections of CIL)
• UN Security Council and General Assembly resolutions
• State practice and opinio juris evidence
• Highly regarded academic works (Brownlie, Crawford, Cassese)

5.2 Essential Research Databases

6.1 Memorial Structure

• Cover Page (team number, year, side)
• Table of Contents
• Index of Authorities
• Questions Presented
• Statement of Jurisdiction
• Statement of Facts
• Summary of Pleadings
• Pleadings (Detailed Arguments)
• Prayer for Relief

6.2 The IREAC Structure — Core of Every Argument

6.3 Statement of Facts — Advocacy, Not Narration

• Select and sequence facts to tell a coherent story favourable to your client.
• Include all facts from the compromis, but frame them in your client’s favour.
• Avoid legal argument in the facts section — analysis belongs in pleadings.
• Use precise, authoritative language; cite to the relevant compromis paragraphs.
• End with the posture of the case — why the Court’s resolution is necessary.

6.4 Bluebook Citation — International Law

6.5 Advanced Drafting Techniques

Headers as Argument Statements

Headers in the pleadings section should function as standalone argument statements. A reader should understand your case structure by reading only the headers.

Counter-Argument Anticipation

The best memorials anticipate and preemptively address the strongest counter-arguments. After making your primary argument, add a subsection: “Respondent may argue… however, this contention is without merit because…” This eliminates the opponent’s strongest position before they can deploy it.

7.1 Structure of Oral Submissions

• Opening & Roadmap: Introduce yourself, state your client, and give a clear roadmap. Maximum 60 seconds.
• Argument 1 (Primary): Your strongest point — doctrinal precision and factual specificity.
• Argument 2 (Secondary): A distinct second point, introduced with a clear transition.
• Reservation of Rebuttal: If first speaker, reserve rebuttal time at the outset.
• Closing: Brief, punchy conclusion encapsulating the relief sought.

7.2 Handling Judicial Interventions — PAUSE–THANK–ANSWER–RETURN

7.3 Bench Control — Elite Techniques

• Strategic Roadmapping: Raise anticipated questions in your roadmap: “I will address the proportionality issue, which the Court may also wish to explore.” This creates permission to lead the bench where you want to go.
• The Pivot: Answer directly, then return to your strongest ground: “Our answer is [X]. This connects directly to the proportionality analysis because…”
• Flagging Deferred Arguments: When forced to defer: “My colleague will address this in greater detail; for present purposes, I note that…”
• Strategic Concession: Concede genuine weaknesses — it increases your credibility on the stronger points. Never fight unwinnable battles.

7.4 Rebuttal — The Highest-Leverage Moment

7.5 Advocacy Scoring Criteria

8.1 Team Roles

8.2 Internal Deadline Calendar

• Weeks 1–2: Compromis read-through, issue identification, initial research plan
• Weeks 3–6: Deep research phase — primary sources, CIL survey, jurisprudence
• Weeks 7–8: Argument development, issue trees, outline approval by coach
• Weeks 9–12: First drafts of both memorials
• Weeks 13–14: Internal review, editing, counter-argument stress testing
• Week 15: Final polishing, citation checking, formatting compliance
• Week 16: Memorial submission

9.1 Memorial Mistakes

Over-Citation Without Analysis

Citing ten cases to support a proposition does not make an argument stronger if none of the cases are analysed. A single authority discussed in depth is worth more than a footnote listing fifteen cases. Quality of citation analysis distinguishes top memorials.

Thin Application

The most universal weakness: excellent doctrinal surveys followed by generic application to facts. Every legal principle must be tested against the specific facts of the compromis. Generic application paragraphs are the most heavily penalised section in memorial scoring.

Formatting Non-Compliance

ILSA rules specify precise formatting requirements — page limits, font sizes, margin widths, citation styles. Non-compliance results in point deductions. Designate one team member to conduct a final formatting compliance check against the current year’s ILSA Rules.

9.2 Oral Round Mistakes

Refusing to Answer Questions Directly

The most reliable way to irritate a judge is to refuse to answer their question. Give a direct answer — even if it is: “That is an area of genuine uncertainty, and the Applicant submits that the better view is…” Judges value intellectual honesty over evasion.

Time Mismanagement

Running out of time before completing key arguments is a preventable failure. Practice under timed conditions. Always complete your prayer for relief — it is the last thing judges hear before scoring.

10.1 How Elite Teams Prepare

• Read the entire body of ICJ jurisprudence relevant to the compromis — not just the most frequently cited cases.
• Write both memorials simultaneously so each is designed as a response to the other.
• Conduct a minimum of five to eight full internal moots before the national round.
• Study the judging style of specific panel members (judge bios are often available at international rounds).
• Submit practice memorials to external reviewers three to four weeks before the submission deadline.

10.2 Building a Persuasive Case Theory

A case theory is a single, compelling answer to: “Why should your client win?” Articulable in two to three sentences. The best case theories identify the principle of international law most strongly supporting the client’s position, AND frame the facts so that the opponent’s position appears contrary to the object and purpose of the relevant legal regime.

10.3 Strategic Policy Arguments

• Object and Purpose: “A ruling in Respondent’s favour would undermine the object and purpose of [treaty] because…”
• Systemic Coherence: “Respondent’s interpretation creates an irreconcilable conflict between [treaty A] and [treaty B], contrary to harmonious interpretation…”
• Deterrence and Precedent: “If Aresia’s conduct is held lawful, every state will be entitled to… which the international community cannot countenance…”

11.1 Research Drills

11.2 Oral Advocacy Simulations

11.3 Bench Book Preparation

Prepare a written bench book containing:

• The 30 most likely judicial questions for each side
• A two-to-three sentence answer to each question
• The single most powerful authority in support of each answer
• A recovery script for the three questions you find most difficult

12.1 Sample Memorial Extract — Pleadings Section

12.2 Sample Bench Questions by Issue Area

12.3 Interactive Speaker Scoring Sheet

13.1 Career Pathways

13.2 LLM Admissions Impact

A Jessup finalist or national champion placing on an LLM application is one of the most compelling items possible. It demonstrates that the applicant has already engaged seriously with public international law at a high level — and can argue it. Top programmes recognise this distinction immediately.

13.3 Networking at International Rounds

The White & Case International Rounds bring together approximately 700–800 law students from 100+ countries for one intense week. The professional relationships formed in Washington D.C. last careers. Jessup alumni networks are active in virtually every jurisdiction — and they remember who argued well.

14.1 30-Day Beginner Roadmap

14.2 90-Day Advanced Preparation Roadmap

14.3 Daily Training Checklist

14.4 10 Essential ICJ Cases Every Mooter Must Know

14.5 Curated Reading List

Foundational Texts

• James Crawford, Brownlie’s Principles of Public International Law (9th ed., Oxford, 2019)
• Malcolm Shaw, International Law (9th ed., Cambridge, 2021)
• Antonio Cassese, International Law (2nd ed., Oxford, 2005)
• Alain Pellet et al., The Charter of the United Nations: A Commentary (3rd ed., Oxford, 2012)

Specialised Works

• Yoram Dinstein, War, Aggression and Self-Defence (6th ed., Cambridge, 2017)
• James Crawford, The ILC’s Articles on State Responsibility: Introduction, Text and Commentaries (Cambridge, 2002)
• Michael Schmitt (ed.), Tallinn Manual 2.0 on the International Law Applicable to Cyber Operations (Cambridge, 2017)

Essential Journals

• American Journal of International Law (AJIL)
• European Journal of International Law (EJIL)
• British Yearbook of International Law (BYIL)
• Leiden Journal of International Law
• German Yearbook of International Law