Article 23d 3.

The officials of and other persons authorised by ESMA to conduct an on-site inspection shall exercise their powers upon production of a written authorisation specifying the subject matter and purpose of the inspection, and the periodic penalty payments provided for in Article 36b where the persons concerned do not submit to the inspection. In good time before the inspection, ESMA shall give notice of the inspection to the competent authority of the Member State where it is to be conducted.