34Thus, so far as concerns, specifically, the Commission’s inspection decisions, it is apparent from Article 20(4) of Regulation No 1/2003 that those inspection decisions must indicate, inter alia, the subject and the objective of the inspection. That obligation to state specific reasons constitutes, as the Court of Justice has made clear, a fundamental requirement not only to show that the intervention envisaged within the undertakings concerned was proportional, but also to put those undertakings in a position to understand the scope of their duty to cooperate, while at the same time preserving their rights of the defence (see, to that effect, judgment in Hoechst v Commission, 46/87 and 227/88, EU:C:1989:337, paragraph 29).
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