advisory jurisdiction

Advisory jurisdiction refers to the power of certain international courts and tribunals to issue non-binding legal opinions on questions referred to them, typically by organs of an international organization, rather than to adjudicate contentious disputes between parties.

The best-known example is the International Court of Justice (ICJ), whose advisory jurisdiction is grounded in Article 96 of the UN Charter and Articles 65–68 of the ICJ Statute. Under Article 96, the General Assembly and Security Council may request advisory opinions on any legal question, while other UN organs and specialized agencies may do so when authorized by the General Assembly and only on questions arising within the scope of their activities.

Although advisory opinions are formally non-binding, they carry significant legal and political weight as authoritative statements of international law. Notable ICJ advisory opinions include:

• Reparation for Injuries Suffered in the Service of the United Nations (1949), which recognized the UN's international legal personality.
• Legality of the Threat or Use of Nuclear Weapons (1996), requested by the General Assembly.
• Legal Consequences of the Construction of a Wall in the Occupied Palestinian Territory (2004).
• Accordance with International Law of the Unilateral Declaration of Independence in Respect of Kosovo (2010).
• Legal Consequences arising from the Policies and Practices of Israel in the Occupied Palestinian Territory (2024).

Other bodies also exercise advisory jurisdiction. The Inter-American Court of Human Rights issues advisory opinions under Article 64 of the American Convention on Human Rights. The International Tribunal for the Law of the Sea (ITLOS) Seabed Disputes Chamber has advisory competence under UNCLOS Article 191, and the full Tribunal has asserted broader advisory jurisdiction (e.g., the 2024 climate change opinion). The European Court of Human Rights gained a limited advisory function under Protocol No. 16 (in force 2018).

Importantly, advisory jurisdiction differs from contentious jurisdiction: it does not require state consent in the same way, since the requesting body is an organ rather than a party, though the ICJ retains discretion under Article 65 to decline a request for compelling reasons.