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Book Launch & Discussion

Comparative Reasoning in International Courts and Tribunals

donderdag 17 oktober 2019
Turfmarkt 99
2511 DP Den Haag

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.


Prof. Panos Merkouris, University of Groningen

Advance reviews of the book

‘Dr Peat has offered fresh insights into two under-studied topics - the place of domestic law in treaty interpretation and the comparative jurisprudence of international courts and tribunals. By calling attention to commonalities and distinctions among the approaches of various courts and identifying judicial practices that may not fit neatly into orthodox narratives, the volume promises to be valuable to scholars, practitioners and jurists alike.’
Joan Donoghue - Judge of the International Court of Justice, Netherlands 

‘A very clear and revealing account of the use of domestic law by international courts and tribunals when interpreting international instruments and international law. This sheds helpful light on important matters of current legal interest.’
Richard Gardiner - University College London 

‘Tribute must be paid to Daniel Peat for his masterful dissertation, offering a brilliant analysis of the complex issue of the interaction between domestic and international law in international dispute settlement. It explores the profound implications of this normative interaction, shifting the perspective to the comparative reasoning of international adjudicators. The analysis of different jurisdictional settings, the diachronic approach and the sharp reading of the case law make this book a fascinating piece of scholarship.’
Hélène Ruiz Fabri - Director, Max Planck Institute Luxembourg for Procedural Law


Admission to the event is free of charge, but registration is mandatory. Please register by sending an email to grotiuscentre@law.leidenuniv.nl before 15 October 2019.

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