(23)Following the experience of the financial crisis, authorities should focus on ongoing rather than ex post supervision. It is, therefore, necessary to ensure that for each review and evaluation under Regulation (EU) No 909/2014, the competent authority has sufficient access to information on a continuous basis. In order to determine the scope of information to be delivered for each review and evaluation, the provisions of this Regulation should follow the requirements for authorisation with which a CSD has to comply under Regulation (EU) No 909/2014. This includes substantive changes to elements already submitted during the process of authorisation, information relating to periodic events and statistical data.