This report is, as its author observes, essentially an explanatory comment on the European Convention. It points out that the Convention regulates more than merely the immunity of states. Chapter I contains the immunity rules proper, Chapter II the procedural rules, in particular those concerning the summoning of a foreign state, Chapter III the rules to ensure that a contracting state gives effect to judgments given against it, whereas Chapter IV is concerned with a peculiarity of the Convention, i.e., the provision that states wishing to extend the number of cases in which immunity cannot be claimed beyond those covered by Chapter I, can make a declaration to that effect. This provision was put forward by The Netherlands delegation and was therefore termed the “zône grise néerlandaise” as distinct from the “black” zone (acta jure imperii)which recognizes immunity and the “white” zone which does not.