77Checking compliance with the requirement of authentication and, thus, the definitive nature of the act is a preliminary to any other review, such as that of the competence of the author of the act, or of compliance with the principle of collegiality or with the duty to provide reasons for the act (judgment of 6 April 2000, Commission v ICI, C‑286/95 P, EU:C:2000:188, paragraph 46).
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