In this book, Cheng aims to inquire into the practical application of the general principles of law by international courts and tribunals.

International lawyers usually disregard the vital functions that general principles of law may play in the decisions of international courts and tribunals. As far as international criminal law is concerned, general principles of law may be crucial to the outcome of an international trial, inter alia because the conviction of an accused in respect of a particular charge may depend on the existence of a given defence under this source. This volume examines the role that general principles of law have played in the decisions of international criminal courts and tribunals. In particular, it analyses their alleged ‘subsidiary’ nature, their process of determination, and their transposition from national legal systems into international law. It concludes that general principles of law have played a significant role in the decisions of international criminal courts and tribunals, not only by filling legal gaps, but also by being a fundamental means for the interpretation of legal rules and the enhancement of legal reasoning.

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.

General Principles and the Coherence of International Lawprovides a collection of intellectually stimulating contributions from leading international lawyers to the discourse on the role of general principles in international law. Offering a comprehensive analysis of the doctrines, practices, and debates on general principles of law, the volume assesses their role in safeguarding the coherence of the international legal system. This important book addresses the relationship between principles of law and the other sources of international law, explores the interplay between principles of law and domestic and regional legal systems and the role of principles of law with regard to three specific regimes of international law: investment law, human rights law and environmental law.

Principles of International Criminal Law is one of the leading textbooks in the field. This third edition builds on the highly-successful work of the previous editions, setting out the general principles governing international crimes as well as the fundamentals of both substantive and procedural international criminal law.

Domestic law has long been recognised as a source of international law, an inspiration for legal developments, or the benchmark against which a legal system is to be assessed. Academic commentary normally re-traces these well-trodden paths, leaving one with the impression that the interaction between domestic and international law is unworthy of further enquiry. However, a different - and surprisingly pervasive - nexus between the two spheres has been largely overlooked: the use of domestic law in the interpretation of international law. This book examines the practice of five international courts and tribunals to demonstrate that domestic law is invoked to interpret international law, often outside the framework of Articles 31 to 33 of the Vienna Convention on the Law of Treaties. It assesses the appropriateness of such recourse to domestic law as well as situating the practice within broader debates regarding interpretation and the interaction between domestic and international legal systems.