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International Criminal Law

International Criminal Law (1st edn)

Douglas Guilfoyle
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date: 01 October 2023

p. 31. The sources of international criminal lawlocked

p. 31. The sources of international criminal lawlocked

  • Douglas GuilfoyleDouglas GuilfoyleAssociate Professor of Law, Monash University


This chapter provides a brief introduction to the two main sources of public international law, treaty law and customary international law. It provides a basic overview of the law of treaties and explains the special status of obligations arising under the United Nations Charter. It outlines the key features of customary international law; examines the relationship between treaty law and customary international law; and revisits the idea of whether there is a hierarchy of sources in international law, and how conflicts between international law norms are to be resolved. The chapter also discusses the relationship between international criminal law and other branches of international law, specifically human rights law and international humanitarian law.

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