377It follows that, as the Advocate General observed in point 177 of his Opinion, the EU legislature is entitled, by adapting a legislative measure in order to increase the social protection of the workers concerned, to alter the conditions in which freedom to provide services is exercised in the field of road transport, since, under Article 58(1) TFEU, the degree of liberalisation in that field is determined not directly by Article 56 TFEU but by the EU legislature itself within the framework of the implementation of the common transport policy. The measures adopted by the Council in relation to the freedom to provide transport services may therefore have the objective not only of facilitating the exercise of that freedom, but also of ensuring, when necessary, the protection of other fundamental interests recognised by the European Union which may be affected by that freedom (see, to that effect, judgment of 8 December 2020, Hungary v Parliament and Council, C‑620/18, EU:C:2020:1001, paragraph 105), including the improvement of working conditions, referred to in the preamble to the FEU Treaty and in the first paragraph of Article 151 TFEU, and the guarantee of adequate social protection within the meaning of Article 9 TFEU and the first paragraph of Article 151 TFEU.
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