(72)It is necessary to clarify the powers and duties of the competent authorities responsible for implementing this Directive, and to strengthen the mechanisms necessary to ensure effective cross-border supervisory cooperation. Under certain circumstances it should be possible for the competent authorities of the host Member States of an AIFM to take direct action to supervise compliance with provisions for which they are responsible. For other provisions the competent authorities of the host Member States should under certain circumstances be allowed to request action from the competent authorities of the home Member State and to intervene if no such action is undertaken.