FORMATION AND EVOLUTION OF THE CONCEPT OF TRANSBOUNDARY IMPACT IN INTERNATIONAL LAW: A CONCEPTUAL AND LEGAL ANALYSIS

Abstract

This article provides a comprehensive conceptual and legal analysis of the formation and evolution of the notion of transboundary impact in international law. The study examines the theoretical foundations of transboundary impact, its position within the framework of international environmental law, its significance for international relations, and the mechanisms of its legal regulation. The article further traces the stages in the development of this concept through international treaty practice, judicial decisions, and doctrinal approaches. The article offers a comparative historical analysis of key milestones, ranging from the Trail Smelter arbitration to contemporary international judicial practice. It examines the 1941 Trail Smelter Arbitral Award, the 1949 International Court of Justice decision in the Corfu Channel Case, and Principle 21 of the 1972 Stockholm Declaration as instruments that established the legal foundations of the concept, while the 1992 Rio Declaration is considered as document that shaped the modern normative framework. The article critically evaluates the theoretical perspectives of leading international legal scholars, including Philippe Sands, Alan Boyle, Christina Voigt. The article identifies the absence of a single universal definition of the concept of transboundary harm and its varying interpretation across different branches of law as the principal scientific problem. As the outcomes of the research, proposals are advanced for the harmonization of international treaties, the modernization of national legislation, and the strengthening of preventive mechanisms. The study is of particular relevance for Uzbekistan, as it serves to reinforce the country's international legal position with regard to the Aral Sea basin and the water resources of Central Asia.