30Nevertheless, it should be borne in mind that the Court has previously held, in paragraph 43 of the judgment of 26 July 2017, Comune di Corridonia and Others (C‑196/16 and C‑197/16, EU:C:2017:589), that, in the event of failure to carry out an EIA required by EU law, Member States must nullify the unlawful consequences of that failure, and that EU law does not preclude regularisation through the conducting of an impact assessment after the plant concerned has been constructed and has entered into operation, subject to the twofold condition that, first, national rules allowing for that regularisation do not provide the parties concerned with an opportunity to circumvent the rules of EU law or to dispense with applying them, and second, an assessment carried out for regularisation purposes is not conducted solely in respect of the plant’s future environmental impact, but also takes into account its environmental impact from the time of its completion.
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