State immunity — Immunity from execution — Human rights — Whether State immunity compatible with right of access to courts — European Convention on Human Rights, 1950, Article 6(1) — Exception to immunity for tort claims in civil proceedings

Human rights — Access to courts — European Convention on Human Rights, Article 6(1) — State immunity — Relationship between State immunity and human rights — Nature of prohibition of crimes against humanity — Whether constituting a rule of jus cogens — Whether taking precedence over principle of State immunity