(18)Provision should be made for the exchange of information between the competent authorities and authorities or bodies which, by virtue of their function, help to strengthen the stability of the financial system. In order to preserve the confidential nature of the information forwarded, the list of addressees should remain within strict limits. It is therefore necessary to specify the conditions under which the abovementioned exchanges of information are authorised; moreover, where it is laid down that information may be disclosed only with the express agreement of the competent authorities, these may, where appropriate, make their agreement subject to compliance with strict conditions. In this regard, and with a view to ensuring the proper supervision of reinsurance undertakings by the competent authorities, this Directive should provide for rules enabling Member States to conclude agreements on exchange of information with third countries provided that the information disclosed is subject to appropriate guarantees of professional secrecy.