When giving the notification referred to in Article 18(2), or at any other time, any Member State may declare that, in its relations with other Member States which have made the same declaration, the judicial authorities or other competent authorities of those Members States may, where appropriate, make requests directly to its judicial authorities or other competent authorities responsible for criminal proceedings against the person whose extradition is requested for supplementary information in accordance with Article 13 of the European Convention on Extradition or Article 12 of the Benelux Treaty.

In making such a declaration, a Member State shall specify its judicial authorities or other competent authorities authorised to communicate to communicate and receive such supplementary information.