Judgment_paragraph 50 · E.ON Földgáz Trade Zrt v Magyar Energetikai és Közmű-szabályozási Hivatal (C-510/13)

50Thus, whilst it is, in principle, for national law to determine an individual’s standing and legal interest in bringing proceedings, EU law nevertheless requires, in addition to observance of the principles of equivalence and effectiveness, that the national legislation should not undermine the right to effective judicial protection, as provided for in Article 47 of the Charter of Fundamental Rights of the European Union (‘the Charter’) (see, to that effect, judgment in Mono Car Styling, C‑12/08, EU:C:2009:466, paragraph 49 and case-law cited).