This Commentary systematically and comprehensively examines the various sources of general international law relevant to international investment law and arbitration.

This book questions whether investment law influences the wider field of general international law, and more specifically, whether approaches adopted by tribunals in investment arbitrations have radiated, or should radiate, into other fields of international law. To answer this question, the book engages in a detailed analysis of pronouncements by investment tribunals on state responsibility, the law of treaties, and general principles of dispute resolution, and evaluates their impact beyond the narrow field of investment law. The perspectives provided in the book highlight how rules of general international law are concretised, specified, and at times moulded in investment arbitration practice. By doing so, the book enhances our understanding of the relationship between general international law and one its most dynamic sub-disciplines. Combining conceptual and practical perspectives, and offering a detailed analysis of the pertinent case law, the book is a plea for a fuller engagement directed at both general international lawyers and international investment lawyers. It will help investment lawyers better understand the role of general international law in their field of practice. General international lawyers will benefit from paying close attention to how investment lawyers apply and interpret rules of general international law.

Transnational investment involves a variety of actors (States, public and private legal entities, and natural persons) whose relationships are governed by rules and legal instruments belonging to different legal systems. This book provides a systematic study of the sources of rights and obligations in the field of transnational investment, and their coordination and interaction. It focuses primarily on the network of over 3,000 Bilateral Investment Treaties, international investment contracts, customary international law, the main multilateral treaties, national legislation, international case law and general principles of law. The book, firmly based on State practice, arbitral awards and national decisions, is indispensable to fully appraise the nature and content of the claims of private investors as well as to identify the law applicable in investment arbitration.

Rules of customary international law provide basic legal protections to foreign investors doing business abroad. These rules remain of fundamental importance today despite the growing number of investment treaties containing substantive investment protection. In this book, Patrick Dumberry provides a comprehensive analysis of the phenomenon of custom in the field of international investment law. He analyses two fundamental questions: how customary rules are created in this field and how they can be identified. The book examines the types of manifestation of state practice which should be considered as relevant evidence for the formation of customary rules, and to what extent they are different from those existing under general international law. The book also analyses the concept of states' opinio juris in investment arbitration. Offering guidance to actors called upon to apply customary rules in concrete cases, this book will be of significant importance to those involved in investment arbitration.

This comprehensive book provides a complete overview of the international legal system of foreign investment protection, synthesising material from treaties, general international law, contracts and case law to demonstrate a coherent system of investment protection. Through this systematic approach, the book considers all aspects of the discipline, providing a thorough and accessible analysis.

In the last decade, international investment law has developed into one of the core areas of international law. The reason for this development is twofold. The number of cases has increased rapidly. The International Centre for Settlement of Investment Disputes has over a hundred pending cases and there are more before ad hoc tribunals, mostly operating under the United Nations' Commission on International Trade Law Rules. In addition, investment law has addressed a number of novel issues while also coming up with some innovative solutions. This book brings together the papers delivered at the Young Scholars Conference in International Economic Law, which was held at the University of Vienna Law School in June 2007. Under the general topic of "Current Issues and Developments in International Investment Law," the speakers addressed core issues like the definition of investment, legitimate expectations of investors, and the meaning and importance of references to domestic law included in many Bilateral Investment Treaties. Also discussed were topics like the role of investment law in the context of the European Union and its relation to cultural matters, human rights, and other non-investment issues. As international investment law is becoming more and more significant, a book such as this, dedicated to the latest developments in the field, will be of utmost importance to anyone interested in this area of law.

International investment law has become increasingly prominent in the international legal order, spurred on by the explosion of Bilateral Investment Treaties between States and a sharp rise in international investment disputes. This rise to prominence has however not always been matched by academic reflection on the content of procedure of international investment law and its role within general international law. This volume seeks to remedy this situation by providing careful analysis of every area of international investment law and its relationship with other legal fields. It is written in honor of one of the leading experts in the field of investment arbitration, Christoph Schreuer. The book explores specific and topical problems of international investment law and practice in a focused way. It also provides a forum for broader theoretical reflections on international investment law and its relation to general international law. The book includes chapters on jurisdictional questions, issues of procedure in investment proceedings, the relationship between investment arbitration and other forms of investment protection, problems of substantive investment law, regional aspects, interfaces between investment law and other areas of law as well as the future of the law of investment protection. Featuring contributions by many of the most prominent scholars and practitioners of investment arbitration, this work should become an indispensable tool for practitioners and academics working in the field.