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"European Union Treaty of Accession 2003
Countries involved in the treaty, with newly joining countries in yellow, and existing EU countries in blue.
Type Accession treaty
Signed 16 April 2003
Location "Athens
Effective 1 May 2004
Condition ratification by the 10 acceding states and all 15 Member States of the European Union
25 / 25
Depositary Government of the Italian Republic
Languages All 11 official "Languages of the European Union, "Czech, "Estonian, "Hungarian, "Latvian, "Lithuanian, "Maltese, "Polish, "Slovak, "Slovene

After amendments made by the Athens Treaty:
Consolidated version of TEC (2006)

Consolidated version of TEU (2006)

Consolidated version of Protocols & Annexes (2006)
""Flag of Europe.svg
This article is part of a series on the
"politics and government of
European Union

The "Treaty of Accession 2003 was the agreement between the "member states of the European Union and ten countries ("Czech Republic, "Estonia, "Cyprus, "Latvia, "Lithuania, "Hungary, "Malta, "Poland, "Slovenia, "Slovakia), concerning these countries' "accession into the EU (see "2004 enlargement of the European Union). At the same time it changed a number of points which were originally laid down in the "Treaty of Nice. The treaty was signed on 16 April 2003 in "Athens, "Greece and it "entered into force on 1 May 2004, resulting in "enlargement of the European Union with 10 states.


The reconstructed ancient "Stoa of Attalus, where the treaty was signed

The European Union comprises a large number of overlapping legal structures which is a result of it being defined by successive international treaties.

As well as "other acts["citation needed] which together form the current legal framework ("acquis) of the EU, the Treaty of Accession 2003 modifies:

All changes to the above treaties are made by article 11-19 in part two of the accession treaty. Beside of revising voting weights and the number of member state representatives at all European institutions, the most notable change outlined how "Qualified Majority Voting shall be handled in the "Council of the European Union. As from 1 November 2004, whenever the Council vote to adopt a decision by Qualified Majority, this need support both from a majority of member states which at the same time represents minimum 232 out of 321 weighted votes (72,3%), while also as a third requirement those states must represent at least 62% of the total population of the Union. Otherwise the decision in question shall not be adopted.

The Treaty's full name in English is:

Treaty between the Kingdom of "Belgium, the Kingdom of "Denmark, the Federal Republic of "Germany, the "Hellenic Republic, the Kingdom of "Spain, the "French Republic, "Ireland, the "Italian Republic, the Grand Duchy of "Luxembourg, the "Kingdom of the Netherlands, the Republic of "Austria, the "Portuguese Republic, the Republic of "Finland, the Kingdom of "Sweden, the "United Kingdom of Great Britain and Northern Ireland (Member States of the European Union) and the "Czech Republic, the Republic of "Estonia, the Republic of "Cyprus, the Republic of "Latvia, the Republic of "Lithuania, the Republic of "Hungary, the Republic of "Malta, the Republic of "Poland, the Republic of "Slovenia, the "Slovak Republic, concerning the accession of the Czech Republic, the Republic of Estonia, the Republic of Cyprus, the Republic of Latvia, the Republic of Lithuania, the Republic of Hungary, the Republic of Malta, the Republic of Poland, the Republic of Slovenia and the Slovak Republic to the European Union.

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