(20)Prior authorisation for taking up the business of credit institutions is a key prudential technique to ensure that only operators with a sound economic basis, an organisation capable of dealing with the specific risks inherent to deposit taking and credit provision, and suitable directors carry out those activities. The ECB should therefore have the task of authorising credit institutions that are to be established in a participating Member State and should be responsible for the withdrawal of authorisations, subject to specific arrangements reflecting the role of national authorities.