36It is clear from the settled case-law of the Court of Justice that the partial annulment of an EU act is possible only if the elements whose annulment is sought may be severed from the remainder of the act. In that regard, the Court of Justice has repeatedly held that the requirement of severability is not satisfied in the case where the partial annulment of an act would have the effect of altering its substance (judgment of 12 November 2015, United Kingdom v Parliament and Council, C‑121/14, EU:C:2015:749, paragraph 20 and the case-law cited).
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