Diplomatic and consular intercourse and privileges — Special envoys — North Atlantic Treaty Organization — Member of Greek Delegation — Ottawa Agreement on Status of N.A.T.O. national representatives and international staff, 1951 (Articles 12 and 13) — Whether member of Greek Delegation to N.A.T.O. enjoys general diplomatic immunity or immunity restricted to acts done in official capacity — Diplomatic immunity as denned by Vienna Convention on Diplomatic Relations, 1961 — Whether including immunity in civil action concerning private residence — The law of France