48It follows from this that, while Member States essentially retain the freedom to determine the requirements of public policy in accordance with their national needs, which can vary from one Member State to another and from one era to another, the fact still remains that, in the European Union context and particularly when relied upon as a justification for derogating from an obligation designed to ensure that the fundamental rights of third-country nationals are respected when they are removed from the European Union, those requirements must be interpreted strictly, so that their scope cannot be determined unilaterally by each Member State without any control by the institutions of the European Union (see, by analogy, judgment in Gaydarov, C‑430/10, EU:C:2011:749, paragraph 32 and the case-law cited).
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