80That argument cannot be accepted. To acknowledge a declaration, by which a Member State manifests its unwillingness to cooperate with the institution if the latter allows access to a document, as evidence that the decision-making process would be seriously undermined for the purposes of the second subparagraph of Article 4(3) of Regulation No 1049/2001 would amount to giving the Member States discretionary power in that matter or would, at least, make the policy of access to documents implemented by that regulation conditional upon the relevant national policies. That would not be compatible either with the system of access to documents established by Regulation No 1049/2001 (see, that that effect, Sweden v Commission, paragraph 5 above, paragraphs 58 and 65) or with the Member States’ obligation under Article 10 EC to cooperate with the Commission in good faith.