1. The obligation of professional secrecy shall apply to all persons who work or who have worked for the competent authority and for entities to which competent authorities may have delegated certain tasks. Information covered by professional secrecy may not be disclosed to any other person or authority except by virtue of the laws, regulations or administrative provisions of a Member State.

2. Competent authorities of the Member States shall cooperate with each other, whenever necessary, for the purpose of carrying out their duties and making use of their powers, whether set out in this Directive or in national law adopted pursuant to this Directive. Competent authorities shall render assistance to competent authorities of other Member States.

In the exercise of their sanctioning and investigative powers, competent authorities shall cooperate to ensure that sanctions or measures produce the desired results, and shall coordinate their action when dealing with cross-border cases.

2a. The competent authorities may refer to ESMA situations where a request for cooperation has been rejected or has not been acted upon within a reasonable time. Without prejudice to the Article 258 of the Treaty on the Functioning of the European Union (TFEU), ESMA may, in situations referred to in the first sentence, act in accordance with the powers conferred on it under Article 19 of Regulation (EU) No 1095/2010.

2b. The competent authorities shall cooperate with ESMA for the purposes of this Directive, in accordance with Regulation (EU) No 1095/2010.