Case C-115/11: Judgment of the Court (Second Chamber) of 4 October 2012 (reference for a preliminary ruling from the Sąd Apelacyjny w Warszawie — Poland) — Format Urządzenia i Montaże Przemysłowe sp. z o.o. v Zakład Ubezpieczeń Społecznych (Social security — Determination of the legislation applicable — Regulation (EEC) No 1408/71 — Article 14(2)(b) — Person normally employed in the territory of two or more Member States — Successive employment contracts — Employer established in the Member State of habitual residence of the worker — Employment performed exclusively in other Member States)