Judgment of the Court (Fourth Chamber) of 3 April 2019.#Powszechny Zakład Ubezpieczeń na Życie S.A. v Prezes Urzędu Ochrony Konkurencji i Konsumentów.#Reference for a preliminary ruling — Competition — Article 82 EC — Abuse of a dominant position — Regulation (EC) No 1/2003 — Article 3(1) — Application of national competition law — Decision of a national competition authority to impose one fine on the basis of national law and another on the basis of EU law — Charter of Fundamental Rights of the European Union — Article 50 — Principle of ne bis in idem — Whether applicable.#Case C-617/17.