This book explores the process of treaty modification by subsequent practice, explaining how such practice can significantly revise treaty obligations or even c

Under the relevant rules of international law, treaties are interpreted in accordance with the ordinary meaning of the language they use, their object and purpo

The book examines treaty law from the angle of types of motion, combining theory with practical examples and empirical data.

The rules of treaty interpretation codified in the 'Vienna Convention on the Law of Treaties' now apply to virtually all treaties, in an international context a

The 1969 and 1986 Vienna Conventions on the Law of Treaties are essential components of the international legal order. This is the first Commentary on their pro