In international law, legal personality (or international legal personality) refers to an entity's capacity to be a subject of the international legal order — meaning it can hold rights and obligations under international law, conclude treaties, bring international claims, and bear responsibility for wrongful acts.
States are the paradigmatic holders of full international legal personality. They possess what is often called plenary or original personality, traditionally tied to the criteria in the 1933 Montevideo Convention on the Rights and Duties of States: a permanent population, defined territory, government, and capacity to enter into relations with other states.
International organizations possess derivative or functional personality, conferred by their member states through a constituent treaty. The leading authority is the ICJ's 1949 advisory opinion in Reparation for Injuries Suffered in the Service of the United Nations, where the Court held that the UN possesses international personality necessary to fulfil its functions, including the capacity to bring claims against states for injuries to its agents.
Other entities have more limited or contested personality:
- Individuals hold certain rights and duties directly under international law, particularly in human rights treaties and international criminal law (e.g., the Rome Statute regime).
- Insurgent and national liberation movements may acquire limited personality during armed conflict.
- The International Committee of the Red Cross and the Holy See enjoy sui generis personality.
- Multinational corporations and NGOs generally lack international legal personality, though they participate in many international processes.
Legal personality should be distinguished from recognition: an entity may meet the objective criteria for statehood without being widely recognized (e.g., contested cases like Kosovo or Taiwan), and recognition practice affects the practical exercise of personality more than its existence in principle.
In domestic law, the parallel concept allows corporations, municipalities, and sometimes natural features (such as rivers granted personhood in New Zealand's 2017 Te Awa Tupua Act) to function as legal persons.
Example
In its 1949 *Reparation for Injuries* advisory opinion, the International Court of Justice held that the United Nations possessed international legal personality, enabling it to bring a claim against Israel over the assassination of UN mediator Count Folke Bernadotte.
Frequently asked questions
Yes, but in a limited way. Individuals hold certain rights under human rights treaties and can bear criminal responsibility under international criminal law, but they generally cannot conclude treaties or bring claims directly before most international courts.
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