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Marktmissbrauchsverordnung (MAR)
Article 27

Article 27 — Professional secrecy

  1. Any confidential information received, exchanged or transmitted pursuant to this Regulation shall be subject to the conditions of professional secrecy laid down in paragraphs 2 and 3.
  2. All the information exchanged between the competent authorities under this Regulation that concerns business or operational conditions and other economic or personal affairs shall be considered to be confidential and shall be subject to the requirements of professional secrecy, except where the competent authority states at the time of communication that such information may be disclosed or such disclosure is necessary for legal proceedings.
  3. The obligation of professional secrecy applies to all persons who work or who have worked for the competent authority or for any authority or market undertaking to whom the competent authority has delegated its powers, including auditors and experts contracted by the competent authority. Information covered by professional secrecy may not be disclosed to any other person or authority except by virtue of provisions laid down by Union or national law.