The United Nations Convention on the Law of the Non-Navigational Uses of International Watercourses plays a crucial role in protecting and managing international watercourses and other sources of fresh water. Boisson de Chazournes, Mbengue, Tignino, and Sangbana head a team of experts in this Commentary, examining the travaux preparatoires leading to the Convention and the practice that has developed since the adoption of the Convention in 1997. Tackling the rationale and objectives of the provisions, they offer crucial insights to the Convention's impact on the development of a universal regime for shared water resources. Examining cross-cutting topics such as the core water principles, the prevention and settlement of water disputes, the relationship between the Convention and other legal instruments, as well as the role of the ICJ and other judicial means to solve water disputes, this book is crucial to all those who seek a deep understanding of water law.