1. Customary International Law, Thoretical Conceptions and Evidence of its Formation2. Customary International Law and its Relationship with other Sources and Methods of Law-Identifiation3. Visions of Development4. Practical Developments (Part One): Customary International Law in the Case Law of the PCIJ and the ICJ5. Practical Developments (Part Two): Th Case Law of the International Ad Hoc Criminal Tribunals on Customary International Criminal Law6. Evolution of New Customary International Criminal Law: Further Implications7. Developments in Customary International (Criminal) Law: Implications from the Case Law of the ICJ, the ICTY and the ICTR