(33)To contribute to the efficient administration of certificates of qualification, Member States should designate the competent authorities that are to implement this Directive and should set up registers for recording data on certificates of qualification, service record books and logbooks. In order to facilitate the exchange of information between Member States and with the Commission for the purpose of the implementation, enforcement and evaluation of this Directive, as well as for statistical purposes, for maintaining safety and for ease of navigation, Member States should report such information, including data on the certificates of qualifications, service record books and logbooks, by including it in a database kept by the Commission. In keeping that database, the Commission should duly respect the principles of personal data protection.