Member States shall ensure that where national administrative competition authorities carry out an inspection or interview on behalf of and for the account of other national competition authorities pursuant to Article 22 of Regulation (EC) No 1/2003, officials and other accompanying persons authorised or appointed by the applicant national competition authority shall be permitted to attend and actively assist the requested national competition authority, under the supervision of the officials of the requested national competition authority, in the inspection or interview when the requested national competition authority exercises the powers referred to in Articles 6, 7 and 9 of this Directive.

Member States shall ensure that national administrative competition authorities are empowered in their own territory to exercise the powers referred to in Articles 6 to 9 of this Directive, in accordance with their national law on behalf of and for the account of other national competition authorities in order to establish whether there has been a failure by undertakings or associations of undertakings to comply with the investigative measures and decisions of the applicant national competition authority, as referred to in Articles 6 and 8 to 12 of this Directive. The applicant national competition authority and the requested national competition authority shall have the power to exchange and to use information in evidence for this purpose, subject to the safeguards set out in Article 12 of Regulation (EC) No 1/2003.