57More specifically, the Court has taken that step only in quite specific circumstances, notably where there was a risk of serious economic repercussions owing in particular to the large number of legal relationships entered into in good faith on the basis of rules considered to be validly in force and where it appeared that individuals and national authorities had been led to adopt practices which did not comply with EU law by reason of objective, significant uncertainty regarding the implications of European Union provisions, to which the conduct of other Member States or the Commission may even have contributed (judgment of 22 September 2016, Microsoft Mobile Sales International and Others, C‑110/15, EU:C:2016:717, paragraph 61 and the case-law cited).
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