Advisory Jurisdiction of the ICJ

Introduction

Advisory jurisdiction is the power of the International Court of Justice (ICJ) to give an advisory opinion on a legal question referred to it by an authorised United Nations organ or specialised agency.

It is different from the Court’s contentious jurisdiction. In contentious proceedings, the Court decides a dispute between States and gives a binding judgment. In advisory proceedings, the Court provides a legal opinion to an authorised international body.

The basic framework is:

Legal Question

↓

Authorised UN Organ / Specialised Agency

↓

Request for Advisory Opinion

↓

ICJ

↓

Advisory Opinion

The principal provisions are Article 96 of the UN Charter and Articles 65–68 of the ICJ Statute.

Meaning of Advisory Jurisdiction

Advisory jurisdiction refers to the authority of the ICJ to provide an authoritative legal opinion on a question of international law.

The Court is not necessarily being asked to determine a contentious dispute between two States.

Instead, an authorised international body asks:

What is the law on a particular legal question?

The Court then gives its opinion based on international law.

Legal Basis

The main legal provisions are:

• Article 96 of the UN Charter – authority to request advisory opinions
• Article 65 of the ICJ Statute – advisory jurisdiction
• Article 66 of the ICJ Statute – notice and written/oral proceedings
• Article 67 of the ICJ Statute – delivery of advisory opinion
• Article 68 of the ICJ Statute – applicable procedural provisions

Other provisions of the ICJ Statute and Rules of Court may also become relevant depending upon the particular proceeding.

Article 96 of the UN Charter

Article 96 identifies the bodies that may request advisory opinions.

General Assembly

The General Assembly may request an advisory opinion from the ICJ on any legal question.

Security Council

The Security Council may also request an advisory opinion on any legal question.

Other UN Organs and Specialised Agencies

Other organs of the United Nations and specialised agencies may request advisory opinions concerning legal questions arising within the scope of their activities, provided they have been authorised to do so.

This distinction is important.

General Assembly and Security Council

Any legal question

Other authorised bodies and specialised agencies

Legal questions arising within the scope of their activities

Article 65 of the ICJ Statute

Article 65 provides that the Court may give an advisory opinion on any legal question at the request of whatever body may be authorised by or in accordance with the UN Charter to make such a request.

The wording “may” is significant.

The Court is not necessarily compelled to give an advisory opinion in every circumstance.

Who Can Request an Advisory Opinion?

The principal requesting bodies are:

• General Assembly
• Security Council
• other UN organs authorised by the General Assembly;
• specialised agencies authorised under the relevant framework.

Important Exam Point

Individuals and private organisations cannot directly request an advisory opinion from the ICJ.

A request must come from a body legally authorised to make it.

Nature of the Question

The question referred to the ICJ must be a legal question.

It may involve:

• interpretation of international law;
• application of treaties;
• State responsibility;
• rights and obligations under international law;
• legality of conduct;
• consequences of violations of international law.

A question does not cease to be legal merely because it also has political consequences.

Political Questions and Advisory Jurisdiction

International disputes often have both political and legal dimensions.

The fact that a question is politically sensitive does not automatically prevent the ICJ from giving an advisory opinion.

The Court has considered highly political questions where the request presented a genuine legal question.

Consent of States in Advisory Proceedings

This is one of the most important differences between contentious and advisory jurisdiction.

In a contentious case:

State consent is fundamental to jurisdiction.

In advisory proceedings:

The Court does not require the consent of every State that may be affected by the question in the same way as it would in contentious proceedings.

An advisory opinion may therefore concern legal questions relating to States that have not consented to contentious jurisdiction.

However, the Court may consider whether there is a compelling reason to decline the request.

Advisory Jurisdiction vs Contentious Jurisdiction

Advisory Jurisdiction	Contentious Jurisdiction
Legal question	Legal dispute
Request by authorised international body	Case brought by States
States are not necessarily parties	States are parties
Article 65 ICJ Statute	Article 36 ICJ Statute
Article 96 UN Charter	Article 36 framework
Advisory opinion	Judgment
Generally non-binding	Binding on parties
State consent not required in the same manner	State consent fundamental
Provides legal guidance	Determines legal rights and obligations

Is an Advisory Opinion Binding?

Generally, an advisory opinion is not binding in the same manner as a judgment in contentious proceedings.

This is the principal distinction between the two forms of jurisdiction.

However, an advisory opinion may possess considerable:

• legal authority;
• persuasive value;
• interpretative significance;
• normative importance;
• political significance.

Therefore, non-binding does not mean legally unimportant.

Legal Effect of Advisory Opinions

The precise legal effect may depend upon:

• the instrument under which the opinion is requested;
• the legal framework governing the requesting organisation;
• the circumstances of the opinion.

In some contexts, an advisory opinion may have significant consequences for the functioning of an international organisation even though it is not a contentious judgment binding upon States.

Discretion of the ICJ

The ICJ has a degree of discretion in advisory proceedings.

The Court has recognised that advisory opinions are generally intended to provide legal guidance to the requesting body.

However, it may decline to give an opinion where there are compelling reasons recognised by its jurisprudence.

Important Principle

The existence of jurisdiction to give an advisory opinion does not necessarily mean the Court must exercise it in every case.

Judicial Propriety

The Court considers whether responding to the request would be consistent with its judicial function.

It examines factors such as:

• whether the question is legal;
• whether the requesting body is authorised;
• whether the question is sufficiently clear;
• whether there are compelling reasons not to respond;
• whether giving the opinion would be consistent with the Court’s judicial character.

Article 66 – Procedure

Once a valid request for an advisory opinion is received, the Registrar communicates the request to States and organisations that may be able to provide relevant information.

Written statements may be submitted.

The Court may also conduct oral proceedings.

Thus, advisory proceedings can involve extensive participation even though they are not ordinary contentious cases.

Article 67 – Delivery of Opinion

Under Article 67, the Court’s advisory opinion is delivered in an open court.

The opinion is formally communicated to the relevant parties and organisations in accordance with the applicable procedure.

Article 68 – Applicable Procedure

Under Article 68, the Court applies, so far as applicable, the provisions of the Statute concerning contentious proceedings to advisory proceedings.

However, advisory proceedings remain distinct in nature from contentious litigation.

Procedure for Advisory Opinion

The general process can be understood as:

Authorised body adopts request

↓

Legal question referred to ICJ

↓

Registrar communicates request

↓

States / organisations invited to submit observations

↓

Written proceedings

↓

Oral proceedings, where appropriate

↓

Court deliberates

↓

Advisory opinion

↓

Opinion delivered publicly

Participation of States

States may be invited to participate in advisory proceedings.

They may submit:

• written statements;
• observations;
• oral arguments.

Participation does not necessarily transform the proceeding into a contentious case.

A State participating in an advisory proceeding does not automatically become a party to a contentious dispute.

Advisory Opinions and Third States

Because advisory proceedings do not depend upon contentious jurisdiction over every potentially affected State, the Court may address legal questions having implications for States that are not parties to the proceedings.

This is another important difference from contentious jurisdiction.

Advisory Opinion on Legal Consequences

The Court can be asked not merely to identify an abstract rule of law but also to determine the legal consequences arising from a particular situation.

This has occurred in several important advisory proceedings.

Important Advisory Opinions

Reparation for Injuries Suffered in the Service of the United Nations

1949

This was one of the most important early advisory opinions of the ICJ.

The Court considered whether the United Nations possessed international legal personality and whether it had capacity to bring an international claim.

The Court recognised the international legal personality and functional capacity of the United Nations.

Reservations to the Convention on Genocide

1951

The Court considered the legal principles governing reservations to multilateral treaties, particularly the Genocide Convention.

It contributed significantly to the development of treaty law concerning reservations.

Legal Consequences of the Construction of a Wall in the Occupied Palestinian Territory

2004

The General Assembly requested an advisory opinion concerning the legal consequences arising from the construction of a wall in the Occupied Palestinian Territory.

The opinion addressed questions involving:

• international humanitarian law;
• human rights law;
• self-determination;
• obligations of States.

Accordance with International Law of the Unilateral Declaration of Independence in Respect of Kosovo

2010

The Court considered whether the declaration of independence made by Kosovo was in accordance with international law.

The case is important for:

• self-determination;
• territorial questions;
• declarations of independence;
• interpretation of international law.

Legal Consequences of the Separation of the Chagos Archipelago from Mauritius in 1965

2019

The Court considered questions relating to:

• self-determination;
• decolonisation;
• territorial administration;
• obligations arising under international law.

Legal Consequences Arising from the Policies and Practices of Israel in the Occupied Palestinian Territory, including East Jerusalem

2024

The Court considered legal questions concerning the policies and practices of Israel in the Occupied Palestinian Territory.

The opinion addressed issues including:

• self-determination;
• occupation;
• international humanitarian law;
• human rights law;
• legal consequences for States and international organisations.

Advisory Opinions and Development of International Law

Advisory opinions can significantly contribute to the development and clarification of international law.

They may clarify:

• customary international law;
• treaty interpretation;
• State obligations;
• international institutional law;
• self-determination;
• humanitarian law;
• human rights law.

Although not normally binding like contentious judgments, they can carry substantial legal weight.

Advisory Jurisdiction and UN Organisations

Advisory opinions can help the United Nations and its specialised agencies understand the legal limits of their powers and obligations.

For example, an advisory opinion may clarify:

What can an international organisation legally do?

or

What obligations arise under international law from a particular situation?

This makes advisory jurisdiction particularly valuable for the functioning of international organisations.

Advisory Jurisdiction and International Organisations

The ICJ’s advisory function is especially important because international organisations frequently operate in areas involving complex questions of international law.

Advisory opinions can help clarify:

• powers of international organisations;
• obligations of member States;
• treaty interpretation;
• institutional responsibilities;
• legal consequences of international situations.

Advisory Opinion vs Judgment

Advisory Opinion	Judgment
Given in advisory proceedings	Given in contentious proceedings
Requested by authorised body	Result of dispute between parties
Legal question	Legal dispute
Generally non-binding	Binding between parties
No ordinary State-v-State party structure	States are parties
Article 65	Article 36
Article 96 UN Charter	Article 94 UN Charter concerns compliance
Legal guidance	Judicial determination

Advisory Opinion vs Domestic Legal Advice

An ICJ advisory opinion is not merely informal legal advice.

It is a formal opinion delivered by the world’s principal international judicial organ following judicial proceedings.

Therefore, although generally non-binding, it has considerable legal authority.

Advisory Jurisdiction and Political Disputes

A common misconception is that the ICJ cannot deal with political matters.

The correct position is more nuanced.

A question may have political consequences and still be a legal question capable of being considered by the Court.

The Court focuses on the legal nature of the question and its judicial function.

Important Principles

Legal Question

The request must concern a question of law.

Authorised Request

The requesting body must have authority under the UN Charter or applicable framework.

Judicial Function

The Court must act consistently with its judicial character.

Discretion

The Court may decline to give an opinion in exceptional circumstances.

Non-Binding Character

Advisory opinions generally do not possess the same binding force as contentious judgments.

Legal Authority

Despite their generally non-binding character, advisory opinions can carry significant legal and normative weight.

Advisory Jurisdiction Flowchart

Legal Question

↓

Requesting Body

↓

Is the body authorised?

↓

Yes

↓

Request sent to ICJ

↓

States / organisations invited to participate

↓

Written submissions

↓

Oral proceedings

↓

ICJ deliberation

↓

Advisory Opinion

↓

Generally non-binding

↓

Substantial legal and normative authority

Complete Framework

General Assembly / Security Council / Authorised UN Body / Specialised Agency

↓

Legal Question

↓

Request under Article 96 UN Charter

↓

Article 65 ICJ Statute

↓

ICJ examines request

↓

Written + Oral Proceedings

↓

Advisory Opinion

↓

Article 67 – Public delivery

↓

Generally non-binding

↓

Legal guidance + interpretative authority

Important Articles for Examination

Provision	Importance
UN Charter Article 92	ICJ as principal judicial organ
UN Charter Article 96	Advisory opinions
ICJ Statute Article 34	Parties in contentious cases
Article 36	Contentious jurisdiction
Article 38	Applicable sources of international law
Article 41	Provisional measures
Article 59	Binding force of judgments
Article 60	Finality of judgments
Article 65	Advisory jurisdiction
Article 66	Procedure for advisory opinions
Article 67	Delivery of advisory opinion
Article 68	Applicable procedural provisions

Quick Revision

Question	Answer
Meaning	ICJ’s power to give advisory opinions
Main provision	Article 65 ICJ Statute
UN Charter provision	Article 96
Subject	Legal question
Main requesting bodies	General Assembly + Security Council
Other bodies	Authorised UN organs and specialised agencies
States’ consent	Not required in the same manner as contentious jurisdiction
Result	Advisory opinion
Generally binding?	No
Legal significance	High
Written proceedings	Possible
Oral proceedings	Possible
Delivery	Public
Important early opinion	Reparation for Injuries, 1949
Treaty reservations	Genocide Convention Reservations, 1951
Important modern opinions	Wall, Kosovo, Chagos, 2024 Occupied Palestinian Territory opinion
Main procedural provisions	Articles 65–68

Key Exam Points

• Advisory jurisdiction is the power of the ICJ to give an opinion on a legal question.
• Its principal legal basis is Article 65 of the ICJ Statute.
• Article 96 of the UN Charter identifies bodies authorised to request advisory opinions.
• The General Assembly and Security Council may request advisory opinions on any legal question.
• Other UN organs and specialised agencies must have the necessary authorisation and the question must arise within the scope of their activities.
• Individuals and private organisations cannot directly request an advisory opinion.
• Advisory jurisdiction is different from contentious jurisdiction.
• In contentious proceedings, State consent is fundamental.
• Advisory proceedings do not require the consent of every State potentially affected in the same manner as contentious proceedings.
• The Court has a degree of discretion in deciding whether to give an advisory opinion.
• A political dimension does not automatically make a question non-legal.
• Article 66 deals with notice and proceedings.
• Article 67 deals with delivery of the opinion.
• Article 68 concerns application of relevant procedural provisions.
• Advisory opinions are generally not binding in the same way as contentious judgments.
• Nevertheless, they have significant legal, interpretative and normative authority.
• Important advisory opinions include:
  • Reparation for Injuries (1949)
  • Reservations to the Genocide Convention (1951)
  • Wall Advisory Opinion (2004)
  • Kosovo Advisory Opinion (2010)
  • Chagos Advisory Opinion (2019)
  • Occupied Palestinian Territory Advisory Opinion (2024)

Conclusion

The advisory jurisdiction of the International Court of Justice enables the Court to provide authoritative legal guidance to the United Nations and other authorised international bodies. It is an important complement to the Court’s contentious jurisdiction.

Under Article 96 of the UN Charter and Article 65 of the ICJ Statute, authorised bodies can refer legal questions to the Court. The Court may then conduct written and, where appropriate, oral proceedings before delivering an advisory opinion.

Unlike a contentious judgment, an advisory opinion is generally not binding. Nevertheless, its authority should not be underestimated. Advisory opinions have played an important role in clarifying international law, resolving difficult questions concerning international organisations and influencing the development of principles such as self-determination, treaty law and State responsibility.

The easiest way to remember advisory jurisdiction is:

Legal Question

↓

Authorised UN Body

↓

Article 96 UN Charter

↓

Article 65 ICJ Statute

↓

ICJ Proceedings

↓

Advisory Opinion

↓

Generally Non-Binding

↓

High Legal and Normative Authority