Article 28
1. By agreement between the requesting authority and the requested authority, and in accordance with the arrangements laid down by the latter, officials authorised by the requesting authority may, with a view to exchanging the information referred to in Article 1, be present in the offices of the administrative authorities of the requested Member State, or any other place where those authorities carry out their duties. Where the requested information is contained in documentation to which the officials of the requested authority have access, the officials of the requesting authority shall be given copies thereof. 2. By agreement between the requesting authority and the requested authority, and in accordance with the arrangements laid down by the latter, officials authorised by the requesting authority may, with a view to exchanging the information referred to in Article 1, be present during the administrative enquiries carried out in the territory of the requested Member State. Such administrative enquiries shall be carried out exclusively by the officials of the requested authority. The officials of the requesting authority shall not exercise the powers of inspection conferred on officials of the requested authority. They may, however, have access to the same premises and documents as the latter, through the intermediation of the officials of the requested authority and for the sole purpose of carrying out the administrative enquiry. 3. The officials of the requesting authority present in another Member State in accordance with paragraphs 1 and 2 must at all times be able to produce written authority stating their identity and their official capacity.