The subject-matter of this article is the Judgment of the International Court of Justice in the Gabčíkovo-Nagymaros case. Following an exposition of the relevant facts, it continues with a critical analysis of the Judgment of the Court. In addition to a brief analysis of the issues involving the law of treaties, the law of state responsibility, the law of state succession, and the treaty obligations of Hungary and Slovakia relating to the use of Danube water and the protection of its environment, it focuses on the rules and principles of general international law concerning the use of international watercourses and the protection of the environment that were applied by the Court in this case.
