28As regards, more particularly, the second component of the principle of impartiality, it should be made clear that, where a number of EU institutions or bodies are given separate responsibilities of their own in the context of a procedure that is liable to result in a decision adversely affecting a party, each of those institutions and bodies is required, in respect of its own activities, to comply with the requirement of objective impartiality. Consequently, even where only one of them has breached that requirement, such a breach is liable to render the decision adopted by the other at the end of the procedure at issue unlawful (see, to that effect, judgment of 20 December 2017, Spain v Council, C‑521/15, EU:C:2017:982, paragraph 94).
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