Judgment_paragraph 27 · Eurosaneamientos SL and Others v ArcelorMittal Zaragoza SA and Francesc de Bolós Pi v Urbaser SA (C-532/15, C-538/15)

27In the context of that cooperation, it is solely for the national court hearing the case, which must assume responsibility for the subsequent judicial decision, to determine, with regard to the particular aspects of the case, both the need for a preliminary ruling in order to enable it to deliver judgment and the relevance of the questions which it refers to the Court. Consequently, where the questions submitted concern the interpretation of EU law, the Court is in principle bound to give a ruling (see judgment of 6 September 2016, Petruhhin , C‑182/15, EU:C:2016:630, paragraph 19 and the case-law cited).