# Commission Decision of 4 March 2008 adopting the SIRENE Manual and other implementing measures for the second generation Schengen Information System (SIS II) (notified under document number C(2008) 774) (Only the Bulgarian, Czech, Dutch, Estonian, Finnish, French, German, Greek, Hungarian, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovenian, Spanish and Swedish texts are authentic) (2008/333/EC), Division 2.12.2: Operational rules

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

Links between alerts do not require special procedures for the exchange of supplementary information. Nevertheless the following principles shall be observed:
In case there is a hit on two or more interlinked alerts, the SIRENE Bureau of the executing Member State shall send a G form for each of them.
No forms shall be sent on alerts which, although linked to an alert on which there was a hit, were not respectively the object of the hit. This rule shall not apply in the case when a linked alert for which there was no hit is an alert for arrest or for a missing person (protection). In this case the communication of the discovery of the linked alert shall be carried out using an M form.

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Source: https://www.legislation.gov.uk/eudn/2008/333/annex/division/2/division/2.12/division/2.12.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2008-333/annex/division-2/division-2.12/division-2.12.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.