4.1 Immunity of States from Jurisdiction

Under customary international law, States have immunity before a foreign court. The immunity consists of jurisdictional immunity and enforcement immunity. The immunity of State is derived from the doctrine of state sovereignty; non-interference and par im parem non habet imperium. A sovereign state is not subject to another sovereign state. The doctrine of state immunity has developed from absolute immunity to restrictive. Only when the act of state was categorized as jure imperii o…