Before 1 May 2004 the cooperation in EU affairs was carried out in the following forms:

• EU-Poland Joint Parliamentary Committee
• Meetings of the President of the European Parliament with Presidents of Parliaments of Candidate Countries – PPCC
• Meetings of chairpersons of parliamentary committees for European affairs from the countries associated with the European Union

The COSAC and the Conference of Speakers of the European Union Parliaments meetings continue after 1 May 2004.