Member States shall ensure that competent authorities have all information-gathering and investigatory powers that are necessary for the exercise of their functions, including:
(a) the power to require information from the following natural or legal persons:
(i) investment firms established in the Member State concerned;
(ii) investment holding companies established in the Member State concerned;
(iii) mixed financial holding companies established in the Member State concerned;
(iv) mixed-activity holding companies established in the Member State concerned;
(v) persons belonging to the entities referred to in points (i) to (iv);
(vi) third parties to whom the entities referred to in points (i) to (iv) have outsourced operational functions or activities;
(b) the power to conduct all necessary investigations of any person referred to in point (a) that is established or located in the Member State concerned, including the right:
(i) to require the submission of documents by the persons
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