National parliaments of the European Union

The national parliaments of the European Union are those legislatures responsible for each member state of the European Union (EU). They have a certain degree of institutionalised influence which was expanded under the Treaty of Lisbon to include greater ability to scrutinise proposed European Union law.

Originally, national members of Parliament (MPs) were appointed to the European Parliament (EP) as Member of the European Parliament (MEPs). In 1979 the first direct elections were held, however national MPs still tended to contest these leading to them holding a "dual mandate". As the work load of an MEP increased, the number of MEPs who were also national MPs decreased and since 2009 it has been banned in all member states.

In 1989 MPs from national parliaments and the European Parliament established the Conference of European Community Affairs Committees (COSAC) to maintain contact between national parliaments and the MEPs. COSAC continues to meet every six months and has now gained the right to submit contributions and examine proposals on EU law relating to Justice and Home Affairs. Aside from COSAC, relations between the EP and national parliaments are dealt with by the Conference of Presidents. The EP seeks to keep national parliament's fully informed of the EPs activities and some EP committees regularly invites national MPs to discuss proposals.

However COSAC itself has little institutional structure and is largely leaderless meaning it is difficult for it to exercise its powers. Any concerted response tends to be spontaneous and self organised.

Because the Maastricht Treaty of 1993 expanded the EU's competencies into areas of justice and home affairs, the treaty outlined the importance of exchanges between the European parliament and its national counterparts in a declaration attached to the treaty. This declaration asked national governments to ensure proposals for EU law were passed on to national parliaments with sufficient time for them to be scrutinised by MP and that contacts between these MPs and MEPs, began with COSAC, be stepped up.

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