Original: The Montevideo Convention on the Rights and Duties of States was a treaty ( which was later accepted as part of customary international law ) signed at Montevideo , Uruguay , on December 26 , 1933 , during the Seventh International Conference of American States .
Simplified: The Montevideo Convention on the Rights and Duties of States is a treaty . The treaty was signed at Montevideo , Uruguay , on December 26 , 1933 , at the Seventh International Conference of American States .