Human rights — Access to court — European Convention on Human Rights, 1950, Article 6(1) — Defendant international organization possessing immunity from jurisdiction — Whether grant of immunity compatible with Article 6(1) — Legitimate aim — Proportionality — Availability of alternative remedy

International organizations — Immunities and privileges — European Space Agency — Immunity from jurisdiction of German courts in labour dispute — Purpose of immunity — Whether immunity compatible with right of access to court under Article 6(1) of the European Convention on Human Rights