State immunity — Jurisdictional immunity — Sovereign acts — Expropriation of immovable property owned by emigrant leaving Romania — Compulsory compensation fixed but not paid in Romania — Attachment and execution — Attempt to obtain attachment of Romanian State property in Switzerland to secure payment of debt — Entitlement of expropriating State to State immunity

Expropriation — Compensation — Securing payment of compensation — Compensation awarded but not paid — Action for attachment to obtain payment of debt — Whether expropriating State entitled to immunity — The law of Switzerland