Expropriation — Legal standards — Ethiopia-United States Treaty of Amity and Economic Relations, 1953 — Requirement that property be taken only for public purpose and on prompt payment of just and effective compensation — Whether judicially manageable standard — Whether too ambiguous for application by court

Relationship of international law and municipal law — Act of State and non-justiciability — United States act of State doctrine — Principle that United States courts will not question validity of expropriation by foreign State of property within that State's territory — Treaty exception to act of State doctrine — Scope of exception — Ethiopia-United States Treaty of Amity and Economic Relations, 1953 — The law of the United States