The character of international law between scholarly reflection of foreign policy expediencies and recognising prescriptive rules binding on all concerned has long been a particular challenge to those active in the field. Law is not law if there is no procedure to both determine its contents and to show ways to enforce it. It is through its procedures that international law becomes real. Based on an overview of the varied procedures e.g. in both The Hague’s and the national courts and those found in international organisations a more consistent picture of international law emerges. This compendium for students and practitioners is accessible yet sophisticated in its approach.