The role and composition of the Standing Committee on Operational Cooperation on Internal Security (COSI) is explained in Article 71 of the Treaty on the Functioning of the EU.
COSI facilitates, promotes and strengthens coordination of EU member states’ operational actions related to the EU’s internal security. The committee
- ensures effective operational cooperation on EU internal security matters, including in law enforcement, border control and judicial cooperation in criminal matters;
- evaluates the general direction and efficiency of operational cooperation;
- assists the Council in responding to terrorist attacks or natural or man-made disasters.
COSI consists of high-level officials from each EU member state’s interior and/or justice ministry, as well as Commission and representatives from the European External Action Service.