Article 51

Article 51 of the UN Charter (1945) reads: 'Nothing in the present Charter shall impair the inherent right of individual or collective self-defence if an armed attack occurs against a Member of the United Nations, until the Security Council has taken measures necessary to maintain international peace and security.' It is the only provision in the Charter that explicitly preserves the right to use force outside Security Council authorisation, and it has shaped every major self-defence claim since 1945. In the Iran conflict, UAE Ambassador Mohamed Abushahab invoked Article 51 at the UN Security Council emergency session on 19 May 2026, following a drone strike on the Barakah Nuclear Power Plant perimeter on 17 May, reserving the UAE's 'full and inherent right to protect our territory and population'.

The Barakah invocation was the second Article 51 claim by a Gulf state in this conflict. On 5 April 2026, following Iranian drone strikes on two Kuwaiti desalination plants supplying 90% of Kuwait's drinking water, Saudi Arabia invoked Article 51 — the first such invocation by any Gulf state in the war. Historical precedents include the US post-9/11 invocation for the Afghanistan campaign (2001), France after the Paris Bataclan attacks (2015), and the UK citing collective self-defence for strikes against ISIS in Syria (2015). The threshold question — whether Article 51 covers attacks by non-state proxies attributed to a state — remains contested in international law.

The significance of Gulf States invoking Article 51 at the UNSC is that it formally places on the record a legal basis for military retaliation without a new Security Council resolution. Russia and China's unprecedented joint condemnation of the Barakah strike at the same session signalled that nuclear-plant attacks represent a threshold even veto powers acknowledge — narrowing Iran's tactical room while expanding the legal framework available to Gulf coalitions.