Article 27 of the United Nations Charter establishes the voting rules of the Security Council and is the textual seat of what is commonly called the "veto power" of the permanent five (P5). Drafted at the San Francisco Conference in 1945 and refined through the Yalta Formula agreed by Roosevelt, Churchill, and Stalin in February of that year, Article 27 was the political price extracted by the great powers for their participation in the new collective security system. The original text required seven affirmative votes; following the 1963 amendment (General Assembly Resolution 1991 A (XVIII)) that expanded the Council from eleven to fifteen members, the threshold was raised to nine, taking effect on 31 August 1965. The article consists of three paragraphs: paragraph 1 grants each member one vote; paragraph 2 governs procedural matters; paragraph 3 governs all other matters and contains the "concurring votes of the permanent members" formula along with the obligation that a party to a dispute under Chapter VI shall abstain from voting.
Procedurally, the application of Article 27 unfolds in three steps. First, the Council must determine whether the question before it is "procedural" within the meaning of paragraph 2 or a "substantive" (non-procedural) matter under paragraph 3. Procedural questions — adoption of the agenda, invitation of non-members under Rule 37, suspension of meetings — require nine affirmative votes from any combination of members and are not subject to the veto. Second, if the matter is substantive, nine affirmative votes are still required, but a negative vote by any one of the five permanent members (China, France, Russia, the United Kingdom, the United States) defeats the draft. Third, the determination of whether a question is procedural is itself treated as a substantive question — the so-called "double veto" — under the interpretive understanding announced by the four sponsoring governments at San Francisco on 7 June 1945 (the Four-Power Statement).
The phrase "concurring votes of the permanent members" has been interpreted, since the Council's earliest practice, to permit abstention or absence without blocking a resolution. The Soviet Union's absence during the adoption of Security Council Resolution 82 on 25 June 1950 authorizing the Korea intervention was the first major test; the International Court of Justice subsequently confirmed this reading in its 1971 Advisory Opinion on Namibia (Legal Consequences for States of the Continued Presence of South Africa in Namibia), holding that voluntary abstention by a permanent member does not bar a valid decision. The mandatory abstention rule in the second sentence of paragraph 3 — that a party to a Chapter VI dispute "shall abstain from voting" — has been observed inconsistently in practice and is rarely invoked when matters are framed under Chapter VII.
Contemporary application is constant. Between February 2022 and 2024, the Russian Federation cast vetoes on draft resolutions condemning the invasion of Ukraine, including the draft tabled by the United States and Albania on 25 February 2022. The United States vetoed multiple drafts on Gaza ceasefire arrangements during 2023–2024, including the Algerian-sponsored text on 20 February 2024. China and Russia jointly vetoed several drafts on Syria's chemical weapons file and humanitarian cross-border access. The United Kingdom and France have not cast a veto since 1989 (the Panama intervention draft and related matters). Drafting practitioners at the U.S. Mission in New York, the Quai d'Orsay, and the Russian Foreign Ministry's International Organizations Department spend substantial time calibrating texts to either secure P5 acquiescence or to force a politically costly veto on the record.
Article 27 must be distinguished from the Uniting for Peace procedure (General Assembly Resolution 377 (V) of 3 November 1950), which permits the General Assembly to consider matters when the Council is deadlocked by veto, and from Article 12(1), which restricts Assembly recommendations while the Council is seized of a matter. It is also distinct from the rules of procedure of the Council itself (the Provisional Rules of Procedure, last amended 1982), which elaborate but cannot override the Charter voting formula. Amendment of Article 27 requires the procedure under Articles 108 and 109, including ratification by two-thirds of UN members and, critically, by all five permanent members — making reform structurally dependent on P5 consent.
Controversies center on veto reform. The Accountability, Coherence and Transparency Group (ACT) launched a code of conduct in 2015 under which signatories pledge not to vote against credible draft resolutions on mass atrocities; over 120 states have endorsed it. The French-Mexican initiative similarly calls for voluntary P5 restraint in atrocity situations. General Assembly Resolution 76/262, adopted by consensus on 26 April 2022, established the "veto initiative" requiring an Assembly debate within ten working days of any veto cast — a procedural innovation that does not amend Article 27 but creates a reputational mechanism around its use. Proposals from the G4 (Brazil, Germany, India, Japan), the African Union's Ezulwini Consensus, and the Uniting for Consensus group diverge sharply on whether new permanent seats should carry the veto.
For the working practitioner, Article 27 is the operative constraint shaping every Council product. Desk officers drafting press elements, penholders circulating blue drafts, and legal advisers parsing Chapter VI versus Chapter VII framing all calculate against the veto arithmetic. Understanding the distinction between procedural and substantive votes, the abstention practice, and the post-2022 Assembly debate requirement is foundational to anticipating outcomes in New York and to advising capitals on whether a Council route, an Assembly route, or a regional organization route offers the most viable path.
Example
On 25 February 2022, the Russian Federation invoked Article 27(3) to veto a U.S.-Albania draft Security Council resolution condemning its invasion of Ukraine, with eleven affirmative votes and three abstentions.