
The International Court of Justice (ICJ), established in 1945 by the UN Charter, is the principal judicial organ of the United Nations. It is based in The Hague and has dealt with around 180 cases so far. The ICJ is the successor to the Permanent Court of International Justice and its Statute is the main constitutional document constituting and regulating the court. The court's workload covers a wide range of judicial activity, including cases on genocide, crimes against humanity, and war crimes. The ICJ is composed of judges elected regardless of nationality, who are of high moral character and competent in international law. The court's decisions are binding only to the parties involved in the particular controversy.
| Characteristics | Values |
|---|---|
| Established | 1945 by the UN Charter |
| Began work | 1946 |
| Successor to | Permanent Court of International Justice |
| Seat | The Hague |
| President | HE Judge Iwasawa Yuji |
| Judges | Elected regardless of their nationality among persons of high moral character |
| Decisions | Binding, final, and without appeal |
| Cases | ~180 |
| Court procedure | Set out in the Rules of Court of the International Court of Justice 1978 (amended on 29 September 2005) |
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What You'll Learn
- The International Court of Justice is the principal judicial organ of the UN
- The ICJ's decisions are binding for involved parties
- The ICJ's predecessor was the Permanent Court of International Justice
- The ICJ's judges are elected, regardless of nationality
- The ICJ's rulings are enforced by the UN Security Council

The International Court of Justice is the principal judicial organ of the UN
The International Court of Justice (ICJ), seated in the Peace Palace in The Hague, is the principal judicial organ of the United Nations. It is the successor of the Permanent Court of International Justice (PCIJ), which was established in 1920 by the League of Nations. The ICJ was established in 1945 by the UN Charter and began its work in 1946. Its official working languages are English and French.
The ICJ is the only principal UN organ not located in New York City. Its workload covers a wide range of judicial activity. The court applies international law as summarized in Article 38 of the ICJ Statute. Article 6 of the Statute provides that all judges should be "elected regardless of their nationality among persons of high moral character" who are either qualified for the highest judicial office in their home states or are competent lawyers with sufficient experience in international law. No more than one judge of each nationality may be represented in the court at the same time, and the judges collectively must reflect the principal civilizations and legal systems of the world.
The ICJ is vested with the power to make its own rules. Court procedure is set out in the Rules of Court of the International Court of Justice 1978 (as amended on 29 September 2005). Cases before the ICJ follow a standard pattern. The court's rulings and opinions are binding on the parties with respect to the particular case ruled on by the court. However, the common law notion of precedent or stare decisis does not apply to the decisions of the ICJ. The court's decision binds only the parties to that particular controversy.
Advisory opinions derive their status and authority from the fact that they are the official pronouncements of the principal judicial organ of the United Nations. Advisory opinions have often been controversial because the questions asked are controversial. One such well-known advisory opinion is the Nuclear Weapons Case. In December 2024, the court began hearings about climate change, its biggest case in history, with 99 countries and more than 12 intergovernmental organizations heard over two weeks.
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The ICJ's decisions are binding for involved parties
The International Court of Justice (ICJ), established in 1945 by the UN Charter, is the principal judicial organ of the United Nations. The ICJ is based in The Hague and has dealt with about 180 cases so far.
The ICJ's decisions are binding for the involved parties. Article 59 clarifies that the common law notion of precedent or stare decisis does not apply to the decisions of the ICJ. The court's decision binds only the parties to that particular controversy. However, under Article 38(1)(d), the court may consider its previous decisions and frequently cites them. The ICJ is also vested with the power to make its own rules.
The ICJ's Statute, similar to that of its predecessor, is the main constitutional document constituting and regulating the court. Article 6 of the Statute provides that all judges should be elected regardless of their nationality and be of high moral character. They should be qualified for the highest judicial office in their home states or be competent lawyers in international law. Judicial independence is addressed in Articles 16-18. Article 16 requires independence from national governments or other interested parties, and Article 17 mandates impartiality by requiring judges to avoid showing prior biases on cases before them.
The ICJ's rulings are enforced by the UN Security Council, as authorized by Chapter XIV of the UN Charter. However, this enforcement is subject to the veto power of the five permanent members of the council. For example, the United States used its veto power after the ICJ ruled against it in the Nicaragua case, where the court found that the US breached its obligation under the Treaty of Friendship with Nicaragua not to use force.
In theory, a judgment of the ICJ is binding, final, and without appeal for the involved parties. By signing the UN Charter, a UN member state agrees to comply with the ICJ's decisions in cases to which it is a party. However, as seen in the Nicaragua case, a state may withdraw its acceptance of the court's compulsory jurisdiction after an unfavourable judgment.
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The ICJ's predecessor was the Permanent Court of International Justice
The International Court of Justice (ICJ), or colloquially the World Court, is the successor to the Permanent Court of International Justice (PCIJ). The ICJ is the only international court that adjudicates general disputes between nations and gives advisory opinions on international legal issues. It is seated in The Hague, Netherlands, and was established in 1945 by the UN Charter, beginning its work in 1946.
The PCIJ was established in 1920 by the League of Nations, following the First World War, as the first worldwide intergovernmental organisation aimed at maintaining peace and collective security. The idea of an international court had been proposed for centuries, and the PCIJ was the first permanent institution established for the purpose of settling international disputes. The court was attached to the League of Nations and was initially well-received by states, politicians, lawyers, and academics. It sat for the first time in 1922 and during its first year issued three advisory opinions.
The PCIJ was responsible for adjudicating international disputes submitted to it by contesting parties and providing advisory opinions on disputes or questions referred to it by the League of Nations. The judges were elected by the council and the Assembly of the League concurrently but independently. Between 1922 and 1940, the court heard 29 cases and delivered 27 separate advisory opinions. However, with heightened international tensions in the 1930s, the court became less used and was unable to meet between 1941 and 1944.
The ICJ's Statute, which sets forth its purpose and structure, draws heavily from that of the PCIJ, whose decisions remain valid. The ICJ consists of a panel of 15 judges elected by the UN General Assembly and Security Council for nine-year terms, with no more than one judge of each nationality represented at the same time. The ICJ has managed around 180-190 cases since its first case in 1947. The court's rulings are binding on the parties with respect to the particular case ruled on, and it has the power to make its own rules and procedure.
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The ICJ's judges are elected, regardless of nationality
The International Court of Justice (ICJ) is the principal judicial organ of the United Nations. Established in 1945 by the UN Charter, the ICJ is the successor to the Permanent Court of International Justice. The ICJ is based in The Hague and vested with the power to make its own rules.
Judicial independence is a key principle of the ICJ. Article 16 of the Charter requires that judges be independent of their national governments or other interested parties. It states that "No member of the Court may exercise any political or administrative function, or engage in any other occupation of a professional nature." Article 17 further requires that judges do not show any prior biases on cases before them.
The ICJ has dealt with around 180 cases so far, covering a wide range of judicial activity. Its decisions are binding only on the parties to the particular controversy. An example of a case is Nicaragua v. United States, where the ICJ ruled that the United States' covert war against Nicaragua violated international law. Following this decision, the United States withdrew from the compulsory jurisdiction of the ICJ in 1986.
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The ICJ's rulings are enforced by the UN Security Council
The International Court of Justice (ICJ) is the principal judicial organ of the United Nations. It was established in 1945 by the UN Charter and began its work in 1946 as the successor to the Permanent Court of International Justice. The ICJ is composed of 15 judges who are elected for nine-year terms by the UN General Assembly and the Security Council. The Court's rulings are binding and final for the parties involved in a case, and UN member states are obliged to comply with the ICJ's decisions if they are a party to the case.
Chapter XIV of the United Nations Charter authorises the UN Security Council to enforce the rulings of the ICJ. However, this enforcement is subject to the veto power of the five permanent members of the Security Council. While the Security Council has the authority to enforce ICJ rulings, it has yet to exercise this power under Article 94(2) of the UN Charter. The Council has only recommended that states refer their disputes to the ICJ on one occasion, in the Corfu Channel Case in 1947.
The ICJ's role in international law and dispute resolution is significant. It settles contentious legal disputes between states in accordance with international law and provides advisory opinions to the Security Council, the General Assembly, and other authorised bodies. The ICJ's advisory opinions are not binding but carry legal weight as they reflect the Court's authoritative views on important issues of international law. The Security Council can refer certain situations to the International Criminal Court (ICC) if international crimes, such as genocide or war crimes, have been committed.
While the Security Council has the authority to enforce ICJ rulings, in practice, it has rarely utilised this power. There is a dynamic where the Council has been reluctant to resort to external actors and UN organs that it does not control. This has resulted in a failure to effectively utilise the ICJ's potential contribution to conflict resolution and international law. Nonetheless, the potential usefulness of the ICJ to the Security Council's work should not be overlooked, and interaction between the two bodies is envisioned by the UN Charter.
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Frequently asked questions
The International Court of Justice (ICJ) is the principal judicial organ of the United Nations, established in 1945 by the UN Charter.
The ICJ has its seat in The Hague, Netherlands.
Article 6 of the Statute states that judges should be "elected regardless of their nationality among persons of high moral character". They must either be qualified for the highest judicial office in their home state or be lawyers with expertise in international law.
The ICJ's workload covers a wide range of judicial activity. So far, it has dealt with about 180 cases.
The ICJ applies international law when deciding cases. Its rulings are binding and final, although they only apply to the parties involved in the specific case.



























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