56According to the Court’s settled case-law, as regards judicial review of the implementation of that principle, bearing in mind the wide discretion enjoyed by the European Union legislature where the common fisheries policy is concerned, the lawfulness of a measure adopted in that sphere can be affected only if the measure is manifestly inappropriate in terms of the objective which the competent institution is seeking to pursue. What must be ascertained is, therefore, not whether the measure adopted by the legislature was the only one or the best one possible but whether it was manifestly inappropriate (judgments of 23 March 2006, Unitymark and North Sea Fishermen’s Organisation, C‑535/03, EU:C:2006:193, paragraphs 57 and 58 and the case-law cited, and of 11 January 2017, Spain v Council, C‑128/15, EU:C:2017:3, paragraph 72 and the case-law cited).
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