Case C-99/09: Judgment of the Court (Fourth Chamber) of 1 July 2010 (reference for a preliminary ruling from the Sąd Najwyższy (Poland)) — Polska Telefonia Cyfrowa sp. z o.o. v Prezes Urzędu Komunikacji Elektronicznej (Telecommunication services — Directive 2002/22/EC — Article 30(2) — Portability of telephone numbers — Power of the national regulatory authorities — Direct charge to the subscriber — Disincentive — Taking costs into consideration)