International law in general — Sources — Customary international law — Treaty practice as source of — Rules of diplomatic immunity — Immunity from civil jurisdiction of municipal courts — Officials of international organizations — The law of Italy

Diplomatic and consular intercourse and privileges — Permanent diplomatic envoys — Privileges and immunities of — Subordinate members of the diplomatic staff — Extent of entitlement to immunity from civil jurisdiction of municipal courts — Whether covers only acts performed in official capacity — Customary international law — Evidence from treaty practice on international organizations The law of Italy

Diplomatic and consular intercourse and privileges — Right of other persons to privileges and immunities — Officials of international organizations — Entitlement to immunity from civil jurisdiction of municipal courts — Distinction between acts performed in official and private capacity — Treaty practice on — The law of Italy

Diplomatic and consular intercourse and privileges — Permanent diplomatic envoys — Privileges and immunities of — Diplomatic envoys and their staff — Immunity from civil jurisdiction of municipal courts — Whether extending to acts performed in private capacity — Whether rule of customary international law to this effect — Evidence of such rule from treaty practice on international organizations — Whether same rule applicable to subordinate diplomatic staff — The law of Italy