65In accordance with the Court’s settled case-law, the subject matter of an action under Article 258 TFEU for failure to fulfil obligations is determined by the Commission’s reasoned opinion, so that the action must be based on the same grounds and pleas as that opinion (judgments of 8 July 2010, Commission v Portugal, C‑171/08, EU:C:2010:412, paragraph 25, and of 5 April 2017, Commission v Bulgaria, C‑488/15, EU:C:2017:267, paragraph 37).
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