69The procedure under Article 108(2) TFEU is essential whenever the Commission has serious difficulties in determining whether aid is compatible with the internal market. The Commission may therefore confine itself to the preliminary examination under Article 108(3) TFEU when taking a decision in favour of aid only if it is able to satisfy itself after the preliminary examination that that aid is compatible with the internal market. If, on the other hand, the initial examination leads the Commission to the opposite conclusion or if it does not enable it to overcome all the difficulties involved in determining whether that aid is compatible with the internal market, the Commission is under a duty to obtain all the requisite opinions and for that purpose to initiate the procedure provided for in Article 108(2) TFEU (judgment of 17 November 2022, Irish Wind Farmers’ Association and Others v Commission, C‑578/21 P, EU:C:2022:898, paragraph 53 and the case-law cited).
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