International organizations — Immunity — Jurisdictional immunity — European Organization for Nuclear Research (“CERN”) — Extension of activities — Whether affecting scope of jurisdictional immunity — Whether requiring modification of agreements with receiving State concerning status of CERN

International organizations — Powers — CERN — Extension of activities — Lease of additional land for new installations — Whether requiring modification of agreements with receiving State concerning status of CERN

Environment — Nuclear energy — Construction of underground facility for subnuclear particle research by international organization — Effect on environment — Adequacy of impact studies — Control by municipal courts

Expropriation — Public interest — Land required for lease to international organization — Decree declaring acquisition of land a matter of urgent public utility — Whether acquisition requiring amendment of agreements between receiving State and international organization or municipal legal enactment — The law of France