# Regulation (EU) 2018/1861 of the European Parliament and of the Council of 28 November 2018 on the establishment, operation and use of the Schengen Information System (SIS) in the field of border checks, and amending the Convention implementing the Schengen Agreement, and amending and repealing Regulation (EC) No 1987/2006, Article 43: Information in the case of non-execution of an alert

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

If a requested action cannot be performed, the Member State from which action is requested shall immediately inform the issuing Member State through the exchange of supplementary information.

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Source: https://www.legislation.gov.uk/eur/2018/1861/article/43 (the official version)
Page: https://openlegislation.uk/eu-regulation-2018-1861/article-43
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.