83Under the principle of sincere cooperation provided for in Article 4(3) TEU, Member States are required to eliminate the unlawful consequences of such a breach of EU law. It follows that the competent national authorities, including national courts hearing an action against an instrument of national law adopted in breach of EU law, are therefore under an obligation to take all the necessary measures, within the sphere of their competence, to remedy the failure to carry out an environmental assessment. That may, for a ‘plan’ or ‘programme’ adopted in breach of the obligation to carry out an environmental assessment, consist, for example, in adopting measures to suspend or annul that plan or programme (see, to that effect, judgment of 28 July 2016, Association France Nature Environnement, C‑379/15, EU:C:2016:603, paragraphs 31 and 32), or in revoking or suspending consent already granted, in order to carry out such an assessment (see, to that effect, judgment of 12 November 2019, Commission v Ireland (Derrybrien Wind Farm), C‑261/18, EU:C:2019:955, paragraph 75 and the case-law cited).
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