31On the other hand, it is settled case-law that the Commission’s powers of investigation are strictly defined, encompassing inter alia the exclusion of non-business documents from the scope of the investigation, the right to legal assistance, the preservation of the confidentiality of correspondence between legal counsel and clients, the obligation to state reasons for the inspection decision and the option of bringing proceedings before the EU courts (see, to that effect, judgment in Roquette Frères, C‑94/00, EU:C:2002:603, paragraphs 44 to 50).
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