42However, it must be pointed out that, although the Member States remain in principle free to determine, according to their own conceptions, what public policy requires, the limits of that concept are a matter of interpretation of that regulation. Consequently, while it is not for the Court to define the content of the public policy of a Member State, it is nonetheless required to review the limits within which the courts of a Member State may have recourse to that concept for the purpose of refusing recognition of a judgment emanating from a court in another Member State (see, by analogy, judgments of 28 March 2000, Krombach, C‑7/98, EU:C:2000:164, paragraphs 22 and 23, and of 16 July 2015, Diageo Brands, C‑681/13, EU:C:2015:471, paragraph 42 and the case-law cited).