1. At the request of an applicant authority, a requested authority shall, without delay, and in any event within 30 days unless otherwise agreed, provide to the applicant authority any relevant information necessary to establish whether an intra-Union infringement has occurred or is occurring, and to bring about the cessation of that infringement.

2. The requested authority shall undertake the appropriate and necessary investigations or take any other necessary or appropriate measures in order to gather the required information. If necessary, those investigations shall be carried out with the assistance of other public authorities or designated bodies.

3. On request from the applicant authority, the requested authority may allow officials of the applicant authority to accompany the officials of the requested authority in the course of their investigations.