Judgment_paragraph 34 · Eurosaneamientos SL and Others v ArcelorMittal Zaragoza SA and Francesc de Bolós Pi v Urbaser SA (C-532/15, C-538/15)

34Although it is true that Articles 101 TFEU and 102 TFEU are concerned solely with the conduct of undertakings and not with laws or regulations emanating from Member States, those articles, read in conjunction with Article 4(3) TEU, which lays down a duty to cooperate, nonetheless require Member States not to introduce or maintain in force measures, even of a legislative or regulatory nature, which may render ineffective the competition rules applicable to undertakings (see, to that effect, order of 5 May 2008, Hospital Consulting and Others, C‑386/07, not published, EU:C:2008:256, paragraph 19 and the case-law cited).