In accordance with the Court's settled case-law, for the purpose of categorising a national measure as State aid, it is necessary, not to establish that the aid has a real effect on trade between Member States but only to examine whether that aid is liable to affect such trade.
En ce qui concerne la promotion de l'électricité d'origine renouvelable, elles contiennent uniquement des critères de compatibilité des aides à la production d'énergies renouvelables (section 1.5.6 des lignes directrices).