Article 19(2) of the Procedural Regulation stipulates that where the Member State concerned does not accept the proposed appropriate measures and the Commission, having taking into account the arguments of the Member State concerned, still considers that those measures are necessary, the Commission is to open the formal investigation procedure.
D’après l’article 107, paragraphe 1, TFUE, pour pouvoir être considérée comme une aide d’État, la mesure doit affecter les échanges entre les États membres et fausser ou menacer de fausser la concurrence.