# Commission Decision of 4 March 2008 adopting the SIRENE Manual and other implementing measures for the second generation Schengen Information System (SIS II) (2008/334/JHA), Division

Extent: E+W+S+N.I.

Several alerts issued by different countries for the same subjects may sometimes occur. It is essential that this does not cause confusion to end-users, and that it is clear to them what measures must be taken when seeking to enter an alert and which procedure shall be followed when a hit occurs. Procedures shall therefore be established for detecting multiple alerts, as shall a priority mechanism for entering them into the SIS II.
This calls for:
checks before entering an alert, in order to determine whether the subject is already in the SIS II,
consultation with the other Member States, when the entry of an alert causes multiple alerts that are incompatible.

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Source: https://www.legislation.gov.uk/eudn/2008/334/annex/division/2/division/2.2/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2008-334/annex/division-2/division-2.2/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.