Brazil has deposited its instrument of ratification for the Vienna Convention on the Law of Treaties between States and International Organisations or between International Organisations, according to the United Nations. The Convention is still not in force.
Brazil deposited its instrument of ratification for the 1986 Vienna Convention on the Law of Treaties between States and International Organisations or between International Organisations on 1 October 2026, the United Nations has said.
Brazil signed the Convention in Vienna on 21 March 1986.
The Convention applies to treaties involving international organisations the rules that the 1969 Vienna Convention set for treaties between states. It covers agreements between states and international organisations, and agreements between international organisations.
Under Article 85, the Convention enters into force on the thirtieth day after the deposit of the 35th instrument of ratification or accession by states. The United Nations says 34 states have deposited so far, leaving the treaty one instrument short.
The UN treaty record shows Brazil made reservations with respect to articles 25 and 66.







