(25)Taking into account the possible burden of gathering and processing a vast amount of information related to the operation of a CSD, and in order to avoid duplications, only relevant modified documents should be provided in the context of the review and evaluation. Those documents should be delivered in a manner that enables the competent authority to identify all the relevant changes made to the arrangements, strategies, processes and mechanisms implemented by the CSD since authorisation or since the completion of the last review and evaluation.