In the case of the banking union, they plan to use Article 127(6) of the Lisbon Treaty which allows the European Council to grant authority to the ECB to perform specific tasks concerning “policies relating to the prudential supervision” of certain financial institutions in the Union.
Daarom hebben de Europese leiders vooral hun weg trachten te vervolgen op basis van intergouvernementele overeenstemming of via bestaande verdragsbepalingen.