Article 16

1. Competent authorities shall cooperate with each other whenever necessary for the purpose of carrying out their duties, making use of their powers whether set out in this Directive or in national law. Competent authorities shall render assistance to competent authorities of other Member States. In particular, they shall exchange information and cooperate in investigation activities. 2. Competent authorities shall, on request, immediately supply any information required for the purpose referred to in paragraph 1. Where necessary, the competent authorities receiving any such request shall immediately take the necessary measures in order to gather the required information. If the requested competent authority is not able to supply the required information immediately, it shall notify the requesting competent authority of the reasons. Information thus supplied shall be covered by the obligation of professional secrecy to which the persons employed or formerly employed by the competent authorities receiving the information are subject. The competent authorities may refuse to act on a request for information where: - communication might adversely affect the sovereignty, security or public policy of the Member State addressed, - judicial proceedings have already been initiated in respect of the same actions and against the same persons before the authorities of the Member State addressed, or - where a final judgment has already been delivered in relation to such persons for the same actions in the Member State addressed. In any such case, they shall notify the requesting competent authority accordingly, providing as detailed information as possible on those proceedings or the judgment. Without prejudice to Article 226 of the Treaty, a competent authority whose request for information is not acted upon within a reasonable time or whose request for information is rejected may bring that non-compliance to the attention of the Committee of European Securities Regulators, where discussion will take place in order to reach a rapid and effective solution. Without prejudice to the obligations to which they are subject in judicial proceedings under criminal law, the competent authorities which receive information pursuant to paragraph 1 may use it only for the exercise of their functions within the scope of this Directive and in the context of administrative or judicial proceedings specifically related to the exercise of those functions. However, where the competent authority communicating information consents thereto, the authority receiving the information may use it for other purposes or forward it to other States' competent authorities. 3. Where a competent authority is convinced that acts contrary to the provisions of this Directive are being, or have been, carried out on the territory of another Member State or that acts are affecting financial instruments traded on a regulated market situated in another Member State, it shall give notice of that fact in as specific a manner as possible to the competent authority of the other Member State. The competent authority of the other Member State shall take appropriate action. It shall inform the notifying competent authority of the outcome and, so far as possible, of significant interim developments. This paragraph shall not prejudice the competences of the competent authority that has forwarded the information. The competent authorities of the various Member States that are competent for the purposes of Article 10 shall consult each other on the proposed follow-up to their action. 4. A competent authority of one Member State may request that an investigation be carried out by the competent authority of another Member State, on the latter's territory. It may further request that members of its own personnel be allowed to accompany the personnel of the competent authority of that other Member State during the course of the investigation. The investigation shall, however, be subject throughout to the overall control of the Member State on whose territory it is conducted. The competent authorities may refuse to act on a request for an investigation to be conducted as provided for in the first subparagraph, or on a request for its personnel to be accompanied by personnel of the competent authority of another Member State as provided for in the second subparagraph, where such an investigation might adversely affect the sovereignty, security or public policy of the State addressed, or where judicial proceedings have already been initiated in respect of the same actions and against the same persons before the authorities of the State addressed or where a final judgment has already been delivered in relation to such persons for the same actions in the State addressed. In such case, they shall notify the requesting competent authority accordingly, providing information, as detailed as possible, on those proceedings or judgment. Without prejudice to the provisions of Article 226 of the Treaty, a competent authority whose application to open an inquiry or whose request for authorisation for its officials to accompany those of the other Member State's competent authority is not acted upon within a reasonable time or is rejected may bring that non-compliance to the attention of the Committee of European Securities Regulators, where discussion will take place in order to reach a rapid and effective solution. 5. In accordance with the procedure laid down in Article 17(2), the Commission shall adopt implementing measures on the procedures for exchange of information and cross-border inspections as referred to in this Article.

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Source: EUR-Lex CELLAR · retrieved 2026-09-05