Diplomatic relations — Immunity — Diplomats — Scope of immunity — Whether exemption from prosecution or a procedural bar — Circumstances in which diplomatic personnel may be subject to criminal prosecution after termination of diplomatic duties — Vienna Convention on Diplomatic Relations, 1961, Article 39(2)

Relationship of international law and municipal law — Treaties — Interpretation by municipal courts — Extent to which United States court bound by Executive’s interpretation of treaties — The law of the United States