49Recourse to the public-policy clause in Article 34(1) of Regulation No 44/2001 can therefore be envisaged only where recognition or enforcement of the judgment given in another Member State would be at variance to an unacceptable degree with the legal order of the State in which enforcement is sought inasmuch as it would infringe a fundamental principle. In order for the prohibition of any review of the substance of a judgment of another Member State to be observed, the infringement would have to constitute a manifest breach of a rule of law regarded as essential in the legal order of the State in which enforcement is sought or of a right recognised as being fundamental within that legal order (see judgment in Apostolides, EU:C:2009:271, paragraph 59 and the case-law cited).
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