According to an update from the United Nations, Brazil deposited on 1 October 2026 its instrument of ratification for the Vienna Convention on the Law of Treaties between States and International Organizations or between International Organizations of 1986. Signed by Brazil on 21 March 1986, the 1986 Convention essentially adapts the provisions of the 1969 Vienna Convention for treaties signed between sovereign states to establish rules for treaties between states and international organizat…