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Conference of Parliamentary Committees for Union Affairs of Parliaments of the European Union (COSAC)


The generally used abbreviation COSAC comes from the original French name Conférence des Organes Specialisés dans les Affaires Communautaires (Conference of Bodies Specialised in Community Affairs). It is a forum for cooperation and exchange of information, especially concerning practical aspects of parliamentary control of EU matters, among the national parliaments of the EU member states and the European Parliament, which was established in May 1989 in Madrid. COSAC holds two meetings per year in the state holding the Presidency of the EU Council.

From 1997, representatives of the Polish parliament and of parliaments of other candidate countries took part - in the capacity of observers - in COSAC meetings. After Poland’s accession to the EU, the Sejm and the Senate are represented by presidium members of their committees for European affairs.

See more: Lexicon of multilateral parliamentary cooperation in EU affairs

COSAC documents on the national parliaments' position in the EU under the Lisbon Treaty

Subsidiarity and proportionality check by the national parliaments