State immunity — Jurisdictional immunity — Employment dispute — Embassy of foreign State — National of receiving State employed as chauffeur — Dismissal — Action for reinstatement — Whether foreign State entitled to jurisdictional immunity — Distinction between sovereign and non-sovereign activities — Vienna Convention on Diplomatic Relations, 1961 — Inapplicability to claims brought against foreign State

State immunity — Attachment and execution — Distinction between jurisdictional immunity and immunity from execution — Reciprocity as basis of immunity from execution — Executive control over procedure for execution against foreign State

Diplomatic relations — Immunity — Entitlement to — Whether restricted to natural persons — Whether embassy of foreign State entitled to diplomatic immunity

Relationship of international law and municipal law — Customary international law — State immunity — Principles recognized by the community of nations — Restrictive theory of immunity — The law of Spain