1. A requested authority in one Member State shall provide a requesting authority in another Member State with the information referred to in Article 5 provided that the requesting authority has exhausted the usual sources of information which it could have used in the circumstances for obtaining the information requested, without running the risk of jeopardising the achievement of its objectives.

2. This Directive shall impose no obligation upon a requested Member State to carry out enquiries or to communicate information, if it would be contrary to its legislation to conduct such inquiries or to collect the information requested for its own purposes.

3. The competent authority of a requested Member State may decline to provide information where the requesting Member State is unable, for legal reasons, to provide similar information.

4. The provision of information may be refused where it would lead to the disclosure of a commercial, industrial or professional secret or of a commercial process, or of information whose disclosure would be contrary to public policy.

5. The requested authority shall inform the requesting authority of the grounds for refusing a request for information.