Foreign States — Respect for interests of foreign States — Dispute between private litigants involving interests of foreign States — Dispute between private litigants involved with territorial dispute between States — Whether properly justiciable in municipal court of third State — Act of State doctrine — Whether wider principle of judicial restraint exists — Sovereign immunity — Trucial States — Whether independent States while under the protection of the United Kingdom — Executive certificate — Law of the Sea — Territorial waters — Extent — The law of England