27It must be added that a new legal rule applies from the entry into force of the act introducing it, and that, while it does not apply to legal situations that arose and became definitive prior to that entry into force, it does apply immediately to the future effects of a situation which arose under the old law, and to new legal situations. The position is otherwise, subject to the principle of the non-retroactivity of legal acts, only if the new rule is accompanied by special provisions which specifically lay down its conditions of temporal application (see, to that effect, judgment of 26 March 2015, Commission v Moravia Gas Storage, C‑596/13 P, EU:C:2015:203, paragraph 32 and the case-law cited).
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