The Rome Statute of the International Criminal Court is the 1998 treaty that created the first permanent international court with authority to prosecute individuals for genocide, crimes against humanity, war crimes, and the crime of aggression. It was adopted on July 17, 1998, at a diplomatic conference in Rome and entered into force on July 1, 2002, after 60 countries ratified it.1United Nations Treaty Collection. Rome Statute of the International Criminal Court As of 2025, 125 countries are states parties.2ICC Assembly of States Parties. The States Parties to the Rome Statute The court sits in The Hague and operates independently from any single government, drawing its authority entirely from the nations that have agreed to be bound by its terms.
The Four Crimes It Covers
Everything the court does flows from four categories of crime defined in the Statute. Penalties for all four can reach 30 years in prison, or life imprisonment when the gravity of the crime justifies it.3United Nations. Rome Statute of the International Criminal Court – Part 7 Penalties
Genocide
Article 6 defines genocide as specific acts committed with the intent to destroy, in whole or in part, a national, ethnic, racial, or religious group. The acts include killing members of the group, causing serious physical or mental harm, and deliberately creating living conditions designed to bring about the group’s physical destruction. The legal threshold is the hardest to meet of any crime in the Statute. Prosecutors must prove the accused specifically intended to eliminate the group, not merely that mass violence occurred.
Crimes Against Humanity
Article 7 covers crimes against humanity, which do not require targeting a specific ethnic or religious group but must be part of a widespread or systematic attack directed against a civilian population. “Widespread” refers to the scale of the violence or number of victims. “Systematic” means the attacks are organized rather than random. Prohibited acts include murder, enslavement, torture, forcible transfer of population, and sexual violence such as rape, sexual slavery, forced pregnancy, and enforced sterilization.4International Committee of the Red Cross. Rome Statute of the International Criminal Court – Article 7 The Rome Statute was the first international treaty to explicitly list conflict-related sexual and gender-based violence as crimes against humanity and war crimes.
War Crimes
War crimes under Article 8 involve serious violations of the laws governing armed conflict, drawn largely from the 1949 Geneva Conventions. They include deliberately killing or torturing protected persons, taking hostages, attacking civilians, pillaging, and using weapons that cause unnecessary suffering. The provisions cover both international and internal armed conflicts, and they apply to anyone who directs or participates in prohibited conduct, regardless of military rank or civilian status.5Legal Information Institute. Rome Statute of the International Criminal Court – Article 8
Crime of Aggression
The crime of aggression was added through amendments adopted at a review conference in Kampala, Uganda, in 2010, but the court’s jurisdiction over it was not activated until July 17, 2018.6Crime of Aggression. Conditions for Action by the ICC Article 8 bis defines it as the planning, preparation, or execution of an act of aggression by someone effectively controlling a state’s political or military action, where that act clearly violates the United Nations Charter.7International Committee of the Red Cross. Amendment to the Rome Statute – Article 8bis Think invasion, military occupation, or bombardment of another country. Liability is limited to senior leaders who can direct a state’s armed forces, making this the most leadership-specific crime in the Statute.
When the Court Can Act
The ICC cannot simply decide to investigate any situation it wants. Three gatekeepers under Article 13 control how a case ever reaches the Prosecutor, and additional jurisdictional rules decide whether the court can then proceed.8International Criminal Court. Rome Statute of the International Criminal Court – Article 13
A state party can refer a situation to the Prosecutor. The United Nations Security Council, acting under Chapter VII of the UN Charter, can refer a situation even when the crimes occurred in a non-member state. That is how the Darfur, Sudan situation reached the court despite Sudan not being a state party.9Cambridge Core. Referrals to the International Criminal Court Under Chapter VII of the United Nations Charter Under Article 15, the Prosecutor can also open an investigation independently based on reliable information, but only after a Pre-Trial Chamber reviews the evidence and finds a reasonable basis to proceed. As of early 2026, the court has opened investigations into 18 situations, with 13 ongoing and 5 concluded.10International Criminal Court. Situations Under Investigation
Once a trigger is pulled, Articles 11 and 12 set the boundaries. The court can act when the alleged crime occurred on the territory of a state party, or when the accused is a national of a state party.11International Criminal Court. Rome Statute of the International Criminal Court – Article 12 Territorial jurisdiction is the broader hook: if a covered crime is committed on a member state’s soil, the accused can be prosecuted even if their country never signed the treaty. That creates practical risk for military and political leaders from non-member states when they operate in or transit through member countries. A non-member state can also voluntarily accept the court’s jurisdiction over a specific situation by filing a declaration with the Registrar.
Temporally, the court only handles crimes committed after July 1, 2002, the date the Statute entered into force. For countries that joined later, the cutoff is the date the treaty took effect for that specific country. No retroactive prosecution is allowed.
Even when all of that lines up, the court is still a last resort. Article 17 establishes complementarity: the ICC can only step in when domestic authorities are unable or unwilling to genuinely investigate and prosecute.12International Criminal Court. Rome Statute of the International Criminal Court – Article 17 If a country is already handling the case in good faith, the ICC will find it inadmissible. The court evaluates “unwillingness” by looking for signs that proceedings are designed to shield a suspect, including unjustified delays, lack of independence, or outcomes inconsistent with genuine accountability. “Inability” covers judicial systems that have substantially collapsed due to conflict or lack of resources. Under Article 19, the accused, a state investigating the same case, or a state whose acceptance of jurisdiction is required can all challenge admissibility, and victims may submit observations.13Office of the United Nations High Commissioner for Human Rights. Rome Statute of the International Criminal Court
No Immunity for Officials
Article 27 strips away the shield of official position entirely. Heads of state, government ministers, members of parliament, military commanders, and any other official can be prosecuted on the same terms as anyone else, and official status cannot reduce a sentence.14International Committee of the Red Cross. Rome Statute of the International Criminal Court – Article 27 Any immunity that might exist under national or international law does not prevent the court from exercising its jurisdiction.
In practice this has produced some of the court’s most politically contentious proceedings, including arrest warrants for sitting heads of state. It also creates friction with the customary international law principle that heads of state enjoy immunity from foreign courts, a tension that remains unresolved when member states are asked to arrest visiting leaders from non-member states.
Rights of the Accused and Role of Victims
The Statute builds in strong protections for defendants. Article 66 places the burden of proof on the Prosecutor and requires guilt to be established beyond reasonable doubt.15International Committee of the Red Cross. Rome Statute of the International Criminal Court – Article 66 Article 67 guarantees prompt notice of charges in a language the accused fully understands, adequate time and facilities to prepare a defense, confidential communication with chosen counsel, trial without undue delay, free legal representation when the accused cannot afford it, the right to examine prosecution witnesses and call defense witnesses on equal terms, a competent interpreter, and the right to remain silent without that silence counting against them.16International Committee of the Red Cross. Rome Statute of the International Criminal Court – Article 67 The Prosecutor also has an affirmative duty to disclose evidence that tends to show the accused is innocent, mitigates guilt, or could undermine prosecution evidence.
Victims are not just witnesses. Under Article 68, when their personal interests are affected, the court must allow them to present their views and concerns at appropriate stages, personally or through legal representatives.17International Committee of the Red Cross. Rome Statute of the International Criminal Court – Article 68 Proceedings can be held in private to shield vulnerable individuals, evidence can be presented electronically, and the Prosecutor can withhold a witness’s identity before trial if disclosure would create a serious safety risk. Sexual violence victims and child witnesses receive additional safeguards, all balanced against the accused’s right to a fair trial.
Article 79 establishes a Trust Fund for Victims, which implements reparations the court orders and provides broader assistance to victims of crimes within the court’s jurisdiction.18Legal Information Institute. International Criminal Court – Trust Fund for Victims (Rome Statute Article 79) It draws on fines, asset forfeitures, and voluntary contributions, and can assist affected communities beyond those involved in any specific case.
How the Court Is Organized and Enforced
The Statute splits the court into four organs that are meant to operate independently: the Presidency, which handles administration; the Judicial Divisions, which include Pre-Trial, Trial, and Appeals chambers; the Office of the Prosecutor, which investigates and brings cases; and the Registry, which runs non-judicial operations. Oversight sits with the Assembly of States Parties, made up of all member countries, which adopts the budget, elects judges and the Prosecutor, and addresses non-compliance.19ICC Assembly of States Parties. Assembly of States Parties Each state party gets one vote.
The court has no police force and no army. Everything depends on member states. Article 86 creates a general duty for states parties to cooperate fully with investigations and prosecutions, including arresting and surrendering suspects, freezing assets, gathering evidence, and making witnesses available.20International Committee of the Red Cross. Rome Statute of the International Criminal Court – Article 86 Many countries have had to pass domestic legislation to make this cooperation legally possible under their own systems.
When a state party fails to cooperate, the court can make a formal finding of non-compliance and refer the matter to the Assembly of States Parties. The Assembly can discuss the issue and apply diplomatic pressure, but the Statute gives the court no direct enforcement mechanism. That is the system’s most persistent weakness. Arrest warrants have gone unexecuted for years when suspects remain in countries unwilling to act on them. Non-member states have no treaty obligation to cooperate, though some do so voluntarily; when the Security Council refers a situation, however, the referral resolution can impose cooperation obligations even on non-member states, backed by the Council’s Chapter VII enforcement authority.
Who’s In, Who’s Out
Membership has grown from the 60 ratifications needed for entry into force to 125 states parties, with African, European, and Latin American countries forming the largest blocs.2ICC Assembly of States Parties. The States Parties to the Rome Statute Several major powers remain outside the system. The United States, China, Russia, and India are not members. Russia signed the treaty in 2000 but never ratified it. China and India have neither signed nor ratified.
Article 127 allows any state party to withdraw by sending written notice to the UN Secretary-General. Withdrawal takes effect one year after notification but does not erase obligations that arose while the country was a member, including any duty to cooperate with investigations opened before the withdrawal date.21United Nations. Rome Statute of the International Criminal Court – Part 13 Final Clauses Burundi and the Philippines have both used this provision, though the ICC has continued investigating pre-withdrawal situations in both countries.
The United States has had a particularly fraught relationship with the court. It signed the Statute on December 31, 2000, but on May 6, 2002, formally notified the UN Secretary-General that it did not intend to become a party and considered itself free of any legal obligations arising from its signature.1United Nations Treaty Collection. Rome Statute of the International Criminal Court Congress went further by passing the American Service-Members’ Protection Act, which prohibits U.S. cooperation with the ICC, bars transfer of classified or law enforcement information to the court, restricts U.S. participation in certain UN peacekeeping operations, and authorizes the president to use “all means necessary” to free any U.S. or allied personnel detained by the court.22Office of the Law Revision Counsel. American Service-Members Protection Act The posture has shifted with different administrations, and the U.S. has at times cooperated with Security Council referrals and provided logistical support to investigations aligned with American foreign policy interests. The underlying tension holds: the U.S. wields veto power on the Security Council that shapes which situations the court can investigate, yet refuses to submit its own personnel to the court’s authority.