International investment law is a subject of growing importance and complexity. Anyone interested in international investment law will appreciate the comprehensive, thoughtful and detailed exploration of this area which this distinguished group of German scholars have provided.

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 provisions, containing thorough and well-structured analyses of each of their Articles. It draws on preparatory works and practice and is written by a large collection of experts from the field

Investor-State Arbitration describes the increasing importance of international investment and the necessary development of a new field of international law that defines the obligations of host states and creates procedures for resolving disputes. The authors examine the international treaties that allow investors to proceed with the arbitration of their claims, describe the most-commonly employed arbitration rules, and set forth the most important elements of investor-State arbitration procedure - including tribunal composition, jurisdiction, evidence, award, and challenge of annulment. The authors trace the evolution and rapid development of the field of international investment, including the formation of the International Center for the Settlement of Investment Disputes (ICSID), and the more than 2,000 bilateral investment treaties, most of which were entered into in the last twenty years. The authors explain how this development has led to far greater certainty for foreign investors in dealing with their host countries, as well as how it has incentivized growth in international trade and commerce.

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 as well as within national legal systems, where treaties have an impact on a large and growing range of matters. The rules of treaty interpretation differ somewhat from typical rules for interpreting legal instruments and legislation within national legal systems. Lawyers, administrators, diplomats, and officials at international organisations are increasingly likely to encounter issues of treaty interpretation which require not only knowledge of the relevant rules of interpretation, but also how these rules have been, and are to be, applied in practice. Since the codified rules of treaty interpretation came into decree, there is a considerable body of case-law on their application. This case-law, combined with the history and analysis of the rules of treaty interpretation, provides a basis for understanding this most important task in the application of treaties internationally and within national systems of law. Any lawyer who ever has to consider international matters, and increasingly any lawyer whose work involves domestic legislation with any international connection, is at risk nowadays of encountering a treaty provision which requires interpretation, whether the treaty provision is explicitly in issue or is the source of the relevant domestic legislation. This fully updated new edition features case law from a broader range of jurisdictions, and an account of the work of the International Law Commission in its relation to interpretative declarations. This book provides a guide to interpreting treaties properly in accordance with the modern rules.

Traditionally, international investment law was conceptualised as a set of norms aiming to ensure good governance for foreign investors, in exchange for their capital and know-how. However, the more recent narratives postulate that investment treaties and investor–state arbitration can lead to better governance not just for foreign investors but also for host state communities. Investment treaty law can arguably foster good governance by holding host governments liable for a failure to ensure transparency, stability, predictability and consistency in their dealings with foreign investors. The recent proliferation of such narratives in investment treaty practice, arbitral awards and academic literature raises questions as to their juridical, conceptual and empirical underpinnings. What has propelled good governance from a set of normative ideals to enforceable treaty standards? Does international investment law possess the necessary characteristics to inspire changes at the national level? How do host states respond to investment treaty law? The overarching objective of this monograph is to unpack existing assumptions concerning the effects of international investment law on host states. By combining doctrinal, empirical, comparative analysis and unveiling the emerging 'nationally felt' responses to international investment norms, the book aims to facilitate a more informed understanding of the present contours and the nature of the interplay between international investment norms and national realities.

The period of an international tribunal's temporal jurisdiction is the span of time during which an act must have occurred before the tribunal may consider if the act breached an obligation. There are many questions concerning this particular aspect of an international tribunal's jurisdiction: Does a tribunal have power over acts that occurred after the entry into force of the obligation allegedly breached, but before the tribunal's jurisdiction was accepted? What about acts that began before the tribunal's jurisdiction was accepted but continued after? To what extent can acts before the period of the tribunal's jurisdiction affect its decision on whether or not there is a breach through acts afterwards? The Temporal Jurisdiction of International Tribunals examines these questions in depth. Despite its importance, the temporal jurisdiction of international tribunals is not well understood. Tribunals often confuse different aspects of their jurisdiction and refuse to hear cases they should have heard, or agree to hear cases they should not. This book reduces this confusion by clarifying the different limits on the temporal jurisdiction of international tribunals and the important distinctions between those limits. The book examines the temporal limits resulting from (i) the entry into force of the obligation supposedly breached, (ii) the acceptance of the tribunal's jurisdiction, and (iii) from the period of limitation, as well as the effect of acts that occurred before these limits. Throughout the book, the author comprehensively compares decisions from a wide variety of sources, including the International Court of Justice, Human Rights Courts, World Trade Organization panels, and investment treaty tribunals. It comments on decisions that arose from some of the most notorious events of the twentieth century, including the "Katyn Massacre" of the Second World War, the 1994 Rwandan genocide, and the "forced disappearance" of American political opponents. It reviews these decisions and identifies common principles that help define the temporal jurisdiction of tribunals to decide breaches of international law. This book is essential for anyone practicing in international law, and anyone building a case that could be affected by temporal jurisdiction.

This book outlines the principles behind the international law of foreign investment. The main focus is on the law governed by bilateral and multilateral investment treaties. It traces the purpose, context, and evolution of the clauses and provisions characteristic of contemporary investment treaties, and analyses the case law, interpreting the issues raised by standard clauses. Particular consideration is given to broad treaty-rules whose understanding in practice has mainly been shaped by their interpretation and application by international tribunals. In addition, the book introduces the dispute settlement mechanisms for enforcing investment law, outlining the operation of Investor-State arbitration. Combining a systematic analytical study of the texts and principles underlying investment law with a jurisprudential analysis of the case law arising in international tribunals, this book offers an ideal introduction to the principles of international investment law and arbitration, for students, scholars, and practitioners alike.

The Vienna Convention on the Law of Treaties (VCLT) – as the ‘treaty on treaties’ – has achieved a rich and nuanced track record of use in international law. It has now been over fifty years since the VCLT was opened for signature in 1969, and over forty years since it entered into force in 1980. As of 2022, the VCLT has been ratified by 116 States and signed by 45 others, with some non-ratifying States also recognising parts as reflective of customary international law. In the intervening decades, the VCLT has had a profound influence on the interpretation, application and development of international investment law, including in the context of investment treaty arbitration. This book presents the first consolidated analysis of how the VCLT has informed the practice of international investment law and the resolution of investor-State disputes, and the role that the VCLT may play in shaping the future of this field. The diverse contributors to this book are scholars and practitioners from around the world, who offer a variety of perspectives on the nexus between the VCLT, international investment law and investor-State dispute settlement (ISDS). Each chapter demonstrates how approaches to key issues of treaty law in investment treaty arbitration diverge or converge from the VCLT and approaches of other international courts, as well as the lessons that investment treaty arbitration could derive – or even offer – for the interpretation and application of the VCLT rules in other settings. Their insights and analyses consider aspects such as the role of the VCLT for: interpretation of more specific approaches to treaty law drafted by treaty negotiators; treaty application in circumstances of contested State territory or succession challenges; temporal challenges arising in treaty interpretation; the status of bilateral investment treaties between European Union Member States and related termination endeavours; questions concerning the validity, termination and amendment of investment treaties, including as part of ongoing ISDS reform processes; current multilateral reform proposals, including the possibility of an appellate mechanism or a multilateral investment court; grappling with the challenge of fragmentation in international investment law, including the role of prior decisions in treaty interpretation, the challenges introduced by treaty conflict and the multitude of approaches that may be taken by national courts when implementing treaties like the New York Convention; and treaty interpretation and drafting as aided by emerging technologies, such as data analytics, machine learning, smart contracts and blockchain. The book’s appendix provides a highly valuable tabular summary of ISDS arbitral practice relating to the VCLT, collating key references from over 350 different procedural orders, decisions and awards. By revisiting the role that the VCLT has played in the development of this field of law, this invaluable book unlocks insights into how the VCLT might be used to support its ongoing development and the resolution of the next generation of investor-State disputes. This book is essential reading for a variety of stakeholders, including arbitrators, counsel, scholars and government officials, who will benefit from its in-depth and practical analysis of the VCLT’s relevance to and impact on investment law and investor-State arbitration and its role in shaping where this field of public international law might be headed in the decades to come.

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.

Investment treaties are some of the most controversial but least understood instruments of global economic governance. Public interest in international investment arbitration is growing and some developed and developing countries are beginning to revisit their investment treaty policies. The Political Economy of the Investment Treaty Regime synthesises and advances the growing literature on this subject by integrating legal, economic, and political perspectives. Based on an analysis of the substantive and procedural rights conferred by investment treaties, it asks four basic questions. What are the costs and benefits of investment treaties for investors, states, and other stakeholders? Why did developed and developing countries sign the treaties? Why should private arbitrators be allowed to review public regulations passed by states? And what is the relationship between the investment treaty regime and the broader regime complex that governs international investment? Through a concise, but comprehensive, analysis, this book fills in some of the many "blind spots" of academics from different disciplines, and is the first port of call for lawyers, investors, policy-makers, and stakeholders trying to make sense of these critical instruments governing investor-state relations.