维也纳条约法公约(英文版) SIGNED AT VIENNA 23 May 1969 ENTRY INTO FORCE: 27 January 1980 The States Parties to the present Convention Considering the fundamental role of treaties in the history of international relations, Recognizing the ever-increasing importance of treaties as a source of international law and as a means of developing peaceful co-operation among nations, whatever their constitutional and social systems, Noting that the principles of free consent and of good faith and the pacta sunt servanda rule are universally recognized, Affirming that disputes concerning treaties, like other international disputes, should be settled by peaceful means and in conformity with the principles of justice and international law, Recalling the determination of the peoples of the United Nations to establis