Article 16 4.

to request one or more national regulatory authorities to supply any information related to the suspected breach;

to request one or more national regulatory authorities to commence an investigation of the suspected breach, and to take appropriate action to remedy any breach found. Any decision as regards the appropriate action to be taken to remedy any breach found shall be the responsibility of the national regulatory authority concerned;

where it considers that the possible breach has, or has had, a cross-border impact, to establish and coordinate an investigatory group consisting of representatives of concerned national regulatory authorities to investigate whether this Regulation has been breached and in which Member State the breach took place. Where appropriate, the Agency may also request the participation of representatives of the competent financial authority or other relevant authority of one or more Member States in the investigatory group.