Case C-457/15: Judgment of the Court (Sixth Chamber) of 28 July 2016 (request for a preliminary ruling from the Verwaltungsgericht Berlin — Germany) — Vattenfall Europe Generation AG v Bundesrepublik Deutschland (Reference for a preliminary ruling — Scheme for greenhouse gas emission allowance trading within the European Union — Directive 2003/87/EC — Temporal scope — Time when the emissions trading obligation arises — Article 3 — Annexe I — Concept of ‘installation’ — Combustion of fuels in installations with a total rated thermal input exceeding 20 MW)