C-231/15Prezes Urzędu Komunikacji Elektronicznej and Petrotel sp. z o.o. w Płocku v Polkomtel sp. z o.o

Domstolens egne nøkkelord

Reference for a preliminary ruling — Electronic communications networks and services — Directive 2002/21/EC — Article 4(1) — Right of appeal against a decision taken by a national regulatory authority — Effective appeal mechanism — Decision of a national regulatory authority to continue to apply pending the outcome of the appeal — Temporal effects of a decision of a national court annulling a decision of a national regulatory authority — Possibility of annulling a decision of the national regulatory authority with retroactive effect — Principles of legal certainty and protection of legitimate expectations.

Tolker