Tammes, A.J.P. Keywords: International organizations | Decisions | Public international law | Sources of law | Mots clefs: Organisations internationales | Décisions | Droit international public | Sources | ABSTRACT A.J.P. Tammes devotes a course to the Decisions of International Organs as a Source of International Law. The author begins with a study of the introduction of a new legislative technique, which is not retained as a source of international law by Article 38 of the Statute of the ICJ. The author next focuses on hyb…