In Principles of Evidence in Public International Law as Applied by Investor-State Tribunals, Kabir Duggal and Wendy Cai examine evidentiary principles of burden of proof and standard of proof by delving into applications by the International Court of Justice and investor-state tribunals.

In Principles of Evidence in Public International Law as Applied by Investor-State Tribunals, Kabir Duggal and Wendy Cai explore the fundamental principles of evidence and how these principles relate to burden of proof and standard of proof. By tracing the applications of major principles recognized by the International Court of Justice and applied by investor-state tribunal jurisprudence, the authors offer valuable insight into the interpretation, understanding, and nuances of indispensable principles of evidence, an area that has been ignored in both investor-state arbitration and public international law more generally.

Evidence in International Investment Arbitration is a detailed analysis of the law and practice surrounding the use of evidence in economic law proceedings before the ICJ, WTO, ITLOS, and investment arbitration.

In A Nascent Common Law: The Process of Decisionmaking in International Legal Disputes Between States and Foreign Investors Frédéric Gilles Sourgens submits that investor-state dispute resolution relies upon an inductive, common law decisionmaking process, which reveals a necessary plurality of first principles within investor-state dispute resolution. Relying upon, amongst others, Wittgenstein's Philosophical Investigations, the book explains how this plurality of first principles does not devolve into arbitrary indeterminacy. A Nascent Common Law provides an alternative account to current theoretical conceptions of investor-state arbitration. It explains that these theories cannot adequately resolve a key empirical challenge: tribunals frequently reach facially inconsistent results on similar questions of law. Sourgens makes an inductive approach, focused on the manner of decisionmaking by tribunals in the context of specific records that can explain this inconsistency.

Article 38 of the Statute of the International Court of Justice defines "international law" to include not only "custom" and "convention" between States but also "the general principles of law recognized by civilized nations" within their municipal legal systems. In 1953, Bin Cheng wrote his seminal book on general principles, identifying core legal principles common to various domestic legal systems across the globe. This monograph summarizes and analyzes the general principles of law and norms of international due process, with a particular focus on developments since Cheng's writing. The aim is to collect and distill these principles and norms in a single volume as a practical resource for international law jurists, advocates, and scholars. The information contained in this book holds considerable importance given the growth of inter-state intercourse resulting in the increased use of general principles over the past 60 years. General principles can serve as rules of decision, whether in interpreting a treaty or contract, determining causation, or ascertaining unjust enrichment. They also include a core set of procedural requirements that should be followed in any adjudicative system, such as the right to impartiality and the prohibition on fraud. Although the general principles are, by definition, basic and even rudimentary, they hold vital importance for the rule of law in international relations. They are meant not to define a rule of law, but rather the rule of law.

The Institute of International Law's 2019 Resolution on the Equality of Parties before International Investment Tribunals represents a major step forward in codification of this essential principle as it applies to investor-state dispute settlement: a principle whose application in this context has attracted increasing controversy in recent years. In this commentary, Campbell McLachlan, who served as the Institute's Rapporteur on the topic, explains the context for the Resolution and sets forth an article-by-article analysis of its provisions, drawing upon a wealth of prior case-law as well as the discussions within the Institute that led to the Resolution. The resulting text is designed to assist counsel and tribunals in investment cases, as well as contribute to the wider debate on the reform of investor-state dispute settlement.

The focus of this edited volume is the often-overlooked importance of secondary rules of international law. Secondary rules of international law-such as attribution, causality, and the standard and burden of proof-have often been neglected in scholarly literature and have seen fragmented application in international legal practice. Yet the systemic nature of international law entails that coherent and consistent application of such rules is a key element in reinforcing the legitimacy of decisions of international courts and tribunals. Accelerated development of international law and international litigation, coupled with the fragmented nature of the adjudicatory terrain calls for theoretical scrutiny and systemic analysis of the developments in the judicial treatment of secondary rules. This publication makes three important contributions to the study of secondary rules. First, it offers a comprehensive, expert doctrinal analysis of how standard of review, causation, evidentiary rules, and attribution operate in the case law of international courts or tribunals in fields spanning human rights, trade, investment, and humanitarian law. Second, it comparatively evaluates the divergent layers of meanings and normative expectations attached to secondary rules in international law scholarship as well as in the judicial practice of international courts and tribunals. Finally, the book investigates the role that secondary rules play in the development of the primary rules in international law and for the legitimacy of the decisions of international courts and tribunals. Earlier scholarly works have not problematized the role of secondary rules of international law in adjudication thoroughly. Secondary Rules of Primary Importance in International Law seeks to fill this gap by emphasizing the consequential nature of these secondary rules and argues that the outcome of litigation is fundamentally shaped by the exact standard of proof, standard of review, or attribution basis that is chosen by adjudicators. As such, the book offers an important resource for the study and practice of international law against the backdrop of the wide-ranging and fragmented nature of international adjudication.