This convention was signed in Vienna on 23 May 1969 and entered into force on 27 January 1980. It recognizes the fundamental role of treaties in international relations and their importance as a source of international law. The convention emphasizes the principles of free consent, good faith, and pacta sunt servanda, and promotes peaceful resolution of treaty disputes in line with justice and international law. It draws on the principles of the United Nations Charter, including equal rights, self-determination, sovereign equality, non-interference, prohibition of the threat or use of force, and respect for human rights and freedoms.