Case C-321/15: Judgment of the Court (Fifth Chamber) of 8 March 2017 (request for a preliminary ruling from the Cour constitutionnelle — Luxembourg) — ArcelorMittal Rodange and Schifflange SA v State of the Grand Duchy of Luxembourg (Reference for a preliminary ruling — Environment — Scheme for greenhouse gas emissions allowance trading in the European Union — Directive 2003/87/EC — Article 3(a) — Articles 11 and 12 — Cessation of activities of an installation — Surrender of unused allowances — Period from and including 2008 to 2012 — No compensation — Broad logic of the greenhouse gas emissions allowance trading scheme)