Court of Justice 8 May 2013, C‑204/12 to C‑208/12 (Essent Belgium NV v Vlaamse Reguleringsinstantie voor de Elektriciteits- en Gasmarkt.)

OPINION OF ADVOCATE GENERAL BOT delivered on 8 May 2013 ( 1 ) Joined Cases C‑204/12 to C‑208/12 Essent Belgium NV v Vlaamse Reguleringsinstantie voor de Elektriciteits- en Gasmarkt (Requests for a preliminary ruling from the Rechtbank van eerste aanleg te Brussel (Belgium)) ‛Free movement of goods — Measures having an effect equivalent to a quantitative restriction — Directive 2001/77/EC —