1. Where, through the provision of services or by the establishment of branches, a management company operates in one or more management company's host Member States, the competent authorities of all the Member States concerned shall collaborate closely.

They shall supply one another on request with all the information concerning the management and ownership of such management companies that is likely to facilitate their supervision and all information likely to facilitate the monitoring of such companies. In particular, the authorities of the management company's home Member State shall cooperate to ensure that the authorities of the management company's host Member State collect the particulars referred to in Article 21(2).

2. In so far as it is necessary for the purpose of exercising the powers of supervision of the home Member State, the competent authorities of the management company's host Member State shall inform the competent authorities of the management company's home Member State of any measures taken by the management company's host Member State pursuant to Article 21(5) which involve measures or penalties imposed on a management company or restrictions on a management company's activities.