The more one gets involved with the definition of State aid under Article 87(1) EC the more there is a realization of how elusive this is. Each and every element of this concept still raises fundamental questions and is still subject to debate. There is one area, however, which is the real frontier of EC State aid law, and indeed of any system aiming to control public subsidies: regulation. This paper attempts to sketch some of the aspects raised by the legal status of regulation under EC State aid control. It does not propose to offer definitive answers. The fact itself that after more than fifty years since the entry into force of the Treaty of Rome we are asking this question is probably a sign that there are no final answers. From another perspective, the issue ultimately depends on policy and not legal choices, which is partly beyond our remit. What we aim to achieve with this paper is two-fold. On the one hand, to analyze the issue at an operative micro-level, by assessing it against the various traditional elements of the notion of State aid under Article 87(1) EC. At the same time, to insert the issue of the control of regulation within its broader systemic and institutional context. This turns on asking what other EC law provisions, particularly internal market rules, could apply to the same measure and what institutional, and even constitutional, implications the application of State aid, rather than internal market rules, might have. It can be anticipated that these considerations do play a crucial role in the definition of EC State aid under Article 87(1) EC and on whether regulation should be covered or not.
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