The Vienna Convention on the Law of Treaties of 1969 (VCLT) is the main instrument that regulates treaties. It defines a treaty and relates to how treaties are made, amended, interpreted, how they operate and are terminated. It does not aim to create specific substantive rights or obligations for parties – this is left to the specific treaty (i.e. the Vienna Convention on Diplomatic Relations creates rights and obligations for States in their diplomatic relations). VCLT governs treaties irrespective of its subject matter or objectives – e.g.: treaties to regulate conduct of hostilities (Geneva Conventions on 1949); treaties setting up...
