I. Introduction
"How many competition authorities in Europe may deal with one and the same cartel and impose penalties on the participating undertakings?"2) At a first view, the reader might think that this quotation is taken from an academic article published approximately a decade ago, discussing the "decentralization" of the EU competition law enforcement under Regulation 1/2003.3) Indeed, this sentence constitutes the first paragraph of the Opinion delivered on 8.9.2011 by Advocate General (AG) Kokott in the case Toshiba (C-17/10 ), a reference for preliminary ruling which is currently pending before the Court of Justice (CJ). The case has the potential to become a land-mark Judgements, which could re-define the multilevel system of competition law enforcement designed by Reg 1/2003, by further decentralizing the enforcement of the EU competition law at the national level. Due to the relevance of the case, this paper analyzes the AG Opinion, in order to assess which could be consequences of the CJ's future Judgement on the multilevel enforcement system of the EU competition policy.