International organizations — United Nations — Officials — Immunity — Scope — Convention on the Privileges and Immunities of the United Nations, 1946 — Article VI, Section 22 — Interpretation — Special Rapporteur of Commission on Human Rights — Whether Section 22 applicable to Special Rapporteur — Functional immunity — Whether interview given to journal by Special Rapporteur official act — Whether covered by immunity — Role of United Nations Secretary-General in deciding whether United Nations agent entitled to immunity

International Court of Justice — Advisory jurisdiction — Convention on the Privileges and Immunities of the United Nations, 1946 — Request for opinion by Economic and Social Council — Opinion binding on State

Relationship of international law and municipal law — Treaties — Effect in municipal law — Convention on the Privileges and Immunities of the United Nations, 1946 — Obligations on States Parties — Obligation to inform municipal court regarding immunity of Special Rapporteur