1. Documents
(a) Proof of the nationality of the person concerned.
(b) Copies of the attestations of professional competence or of the evidence of formal qualifications giving access to the profession in question, and an attestation of the professional experience of the person concerned where applicable.
The competent authorities of the host Member State may invite the applicant to provide information concerning his training to the extent necessary in order to determine the existence of potential substantial differences with the required national training, as laid down in Article 14. Where it is impossible for the applicant to provide this information, the competent authorities of the host Member State shall address the contact point, the competent authority or any other relevant body in the home Member State.
(c) For the cases referred to in Article 16, a certificate concerning the nature and duration of the activity issued by the competent authority or body in the home
…