44The Commission is required to conduct a diligent and impartial examination of the contested measures, so that it has at its disposal, when adopting the final decision establishing the existence and, as the case may be, the incompatibility or unlawfulness of the aid, the most complete and reliable information possible for that purpose (judgment of 29 April 2021, Achemos Grupė and Achema v Commission, C‑847/19 P, not published, EU:C:2021:343, paragraph 43).
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