General Court 9 September 2009, Joined Cases T-227/01 to T-229/01, T-265/01, T-266/01 and T-270/01: Judgment of the Court of First Instance of 9 September 2009 — Diputación Foral de Álava and Others v Commission (State aid — Tax advantages granted by a territorial entity within a Member State — Tax credit of 45 % of the amount of investments — Decisions declaring aid schemes incompatible with the common market and requiring recovery of aid paid out — Trade association — Admissibility — Classification as new aid or as existing aid — Principle of the protection of legitimate expectations — Principle of legal certainty — Principle of proportionality)

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