The Excess Profit exemption scheme, based on Article 185(2)(b) of the Belgian Income Tax Code 1992, pursuant to which Belgium granted tax rulings to Belgian entities of multinational corporate groups authorising those entities to exempt part of their profit from corporate income taxation constitutes aid within the meaning of Article 107(1) of the Treaty that is incompatible with the internal market and that was unlawfully put into effect by Belgium in breach of Article 108(3) of the Treaty.