State immunity — Jurisdictional immunity — Action for damages against ship classification and certification company acting upon delegation from Republic of Panama — Council Regulation (EC) No 44/2001 of 22 December 2000 on jurisdiction and the recognition and enforcement of judgments in civil and commercial matters — Article 2(1) — Whether Italian court having jurisdiction under Regulation — Article 1(1) — Scope of civil and commercial matters — Operations of ship classification and certification societies — Public powers — Whether classification and certification operations conducted in exercise of public powers — Immunity from jurisdiction — Whether customary international law principle of jurisdictional immunity of States precluding court from exercising jurisdiction under Regulation — The law of the European Union