71In addition, in order to be covered by the exception in the first subparagraph of Article 4(3) of Regulation No 1049/2001, the decision-making process must be seriously undermined. That is the case, in particular, where the disclosure of the documents in question has a substantial impact on the decision-making process. The assessment of that serious nature depends on all of the circumstances of the case including, inter alia, the negative effects on the decision-making process relied on by the institution (Muñiz v Commission, cited in paragraph 70 above, paragraph 75).
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