90Finally, it should be noted that, when the Community legislature wishes to delegate its power to amend aspects of the legislative act at issue, it must ensure that that power is clearly defined and that the exercise of the power is subject to strict review in the light of objective criteria (see, to that effect, Case 9/56 Mer oni v High Authority [1958] ECR 133, at p. 152) because otherwise it may confer on the delegate a discretion which, in the case of legislation concerning the functioning of the internal market in goods, would be capable of impeding, excessively and without transparency, the free movement of the goods in question.
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