Whereas the identification of rules of customary international law, through general practice and opinio juris, has been dealt extensively in literature and practice, their interpretation has remained surprisingly unexplored. It is this gap that this short monograph aims to address.

Contents Abbreviations  1 Introduction  2 Interpretation of Customary International Law: Barred Due to Its Nature, or a Valid Method of Content-Determination?  3 The Interpretability and Interpretation of Customary International Law in International Case-Law  4 The Interpretability and Interpretation of Customary International Law in Domestic Case-Law  5 Boundless or Bounded Interpretation?: the Conundrum of In/correct Interpretations  6 Precautions/Limits of Interpretation  7 Jus Cogens Norms as a Limit in the Interpretation of Customary International Law  8 Revision as a Limit in the Interpretation of Customary International Law  9 Misinterpretation: the Rules of Interpretation as a Limit in the Interpretation of Customary International Law  10 Conclusion Annex: 2023 TRICI-Law Draft Guiding Principles on the Interpretation of Rules of Customary International Law Bibliography