56As regards that verification, it must be observed that, although the principle of genuine cooperation underpinning the Schengen acquis implies that the State consulting the SIS should give due consideration to the information provided by the State which issued the alert, it also implies that the latter should make supplementary information available to the consulting State to enable it to gauge, in the specific case, the gravity of the threat that the person for whom an alert has been issued is likely to represent.
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