ICJ Nuclear Weapons Advisory Opinion of 1996 Era

The ICJ's controversial 1996 opinion on the legality of nuclear weapons and its lasting impact.

Background

In 1994, the UN General Assembly requested an advisory opinion from the ICJ on whether the threat or use of nuclear weapons is permitted under international law. The question touched the most sensitive issue in international security: whether the weapons that form the backbone of major-power deterrence are legal. Nuclear weapon states argued the Court should decline the question or find that nuclear deterrence was lawful. Non-nuclear states and civil society pushed for a clear declaration of illegality.

The Court received written and oral submissions from dozens of states, making it one of the most participated-in advisory proceedings in ICJ history.

Finding	Vote	Meaning
No specific authorization for nuclear weapons	Unanimous	No rule of law expressly permits them
No comprehensive and universal prohibition by treaty or custom	11-3	They are not categorically banned as such
Threat or use generally contrary to international humanitarian law	7-7, President's casting vote	Rules on distinction and unnecessary suffering usually bar their use
Cannot decide the extreme self-defense / state-survival scenario	7-7, President's casting vote	The famous non liquet
Obligation to negotiate nuclear disarmament in good faith	Unanimous	A binding forward-looking duty (NPT Article VI)

The Nuclear Weapons Advisory Opinion

Background

The Opinion (1996)

Breaking Down the 1996 Findings