Montevideo Convention Convention on the Rights and Duties of States Ratifications and signatories of the treaty Parties Signatories Other Organization of American States members Signed December 26, 1933 Location Montevideo, Uruguay Effective December 26, 1934 Signatories 20[1] Parties 17[1] (as of November 2021) Depositary Pan American Union Languages English, French, Spanish and Portuguese Full text Montevideo Convention at Wikisource