35Under the principle of cooperation in good faith laid down in Article 4 TEU, Member States are nevertheless required to nullify the unlawful consequences of that breach of EU law. The competent national authorities are therefore under an obligation to take all measures necessary, within the sphere of their competence, to remedy the failure to carry out an environmental impact assessment, for example by revoking or suspending consent already granted in order to carry out such an assessment (see, to that effect, judgments of 7 January 2004, Wells, C‑201/02, EU:C:2004:12, paragraphs 64 and 65; of 3 July 2008, Commission v Ireland, C‑215/06, EU:C:2008:380, paragraph 59; and of 28 February 2012, Inter-Environnement Wallonie and Terre wallonne, C‑41/11, EU:C:2012:103, paragraphs 42, 43 and 46).
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