9 1999-2009 Expanded to Eastern Europe and Lisbon Comes Alive

The Nice Treaty was attacked by many people as a flawed compromise. Germany had demanded that its greater population be reflected in a higher vote weighting in the Council; this was opposed by France, who insisted that the symbolic parity between France and Germany be maintained. The Commission had proposed to replace the old weighted voting system with a double majority system which would require those voting in favour to represent a majority of both member states and population for a proposal to be approved. This was also rejected by France for similar reasons. A compromise was reached, which provided for a double majority of Member States and votes cast, and in which a Member State could optionally request verification that the countries voting in favour represented a sufficient proportion of the EU's population.

The Treaty provided for an increase after enlargement of the number of seats in the European Parliament to 732, which exceeded the cap established by the Treaty of Amsterdam.

The question of a reduction in the size of the European Commission after enlargement was resolved to a degree — the Treaty providing that once the number of Member States reached 27, the number of Commissioners appointed in the subsequent Commission would be reduced by the Council to below 27, but without actually specifying the target of that reduction. As a transitional measure it specified that after 1 January 2005, Germany, France, the United Kingdom, Italy and Spain would each give up their second Commissioner.

The Treaty provided for the creation of subsidiary courts below the European Court of Justice and the Court of First Instance (now the General Court) to deal with special areas of law such as patents.

The Treaty of Nice provides for new rules on closer co-operation, the rules introduced in the Treaty of Amsterdam being viewed as unworkable, and hence these rules have not yet been used.

In response to the failed sanctions against Austria following a coalition including Jörg Haider's party having come to power, and fears about possible future threats to the stability of the new member states to be admitted in enlargement, the Treaty of Nice added a preventive mechanism to sanctions against a Member State that was created by the Amsterdam Treaty.

The Treaty also contained provisions to deal with the financial consequences of the expiry of the European Coal and Steel Community (ECSC) treaty (Treaty of Paris (1951)).

The 2004 enlargement of the European Union was the largest single expansion of the European Union (EU), in terms of territory, number of states, and population to date; however, it was not the largest in terms of gross domestic product. It occurred on 1 May 2004.

The simultaneous accessions concerned the following countries (sometimes referred to as the "A10" countries): Cyprus, the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, and Slovenia. Seven of these were part of the former Eastern Bloc (of which three were from the former Soviet Union and four were and still are members of the Central European alliance Visegrád Group), one of the former Yugoslavia (together sometimes referred to as the "A8" countries), and the remaining two were Mediterranean islands and former British colonies.

The 2007 enlargement of the European Union saw Bulgaria and Romania join the European Union (EU) on 1 January 2007. Together with the 2004 enlargement of the European Union, it is considered part of the fifth wave of enlargement of the European Union.

Romania was the first country of post-communist Europe to have official relations with the European Community. In 1974, a treaty included Romania in the Community's Generalized System of Preferences. After the Romanian Revolution of 1989, membership of the EC, and its successor the European Union (EU), had been the main goal of every Romanian Government and practically every political party in Romania. Romania signed its Europe Agreement in 1993, and submitted its official application for membership in the EU on 22 June 1995 and Bulgaria submitted its official application for membership in the EU on 14 December 1995, the third and the fourth of the post–communist European countries to do so after Hungary and Poland. Along with its official EU application, Romania submitted the Snagov Declaration, signed by all fourteen major political parties declaring their full support for EU membership.

During the 2000s, Bulgaria and Romania implemented a number of reforms to prepare for EU accession, including the consolidation of its democratic systems, the institution of the rule of law, the acknowledgement of respect for human rights, the commitment to personal freedom of expression, and the implementation of a functioning free-market economy. The objective of joining the EU also influenced Romania's regional relations. As a result, Bulgaria and Romania imposed visa regimes on a number of states, including Russia, Ukraine, Belarus, Serbia, Montenegro, Turkey and Moldova.

Within the framework of integration meetings held between the EU member states and the EU candidate states Bulgaria and Romania, an 'Association Committee' was held on 22 June 2004. It confirmed overall good progress for the preparation of accession; however, it highlighted the need for further reform of judicial structures in both Bulgaria and Romania, particularly in its pre-trial phases, as well as the need for further efforts to fight against political corruption and organized crime, including human trafficking. The findings were reflected in the 2004 Regular Report for Bulgaria and Romania.

The Brussels European Council of December 17, 2004 confirmed the conclusion of accession negotiations with Bulgaria and Romania. The 26 September 2006 of the European Commission confirmed the date once more, also announcing that Bulgaria and Romania would meet no direct restrictions, but progress in certain areas — reforms of the judicial system, elimination of corruption and the struggle against organized crime — would be strictly monitored.

With this accession, Cyrillic became the third official alphabet of the EU, after the Latin and Greek alphabets. Cyrillic will also be featured on the euro banknotes and the national (obverse) side of the Bulgarian euro coins. The ECB and the EU Commission insisted that Bulgaria change the official name of the currency from ЕВРО (EVRO) (as accepted) to ЕУРО (EURO), claiming that the currency should have a standard spelling and pronunciation across the EU. For details, see Linguistic issues concerning the euro. The issue was decisively resolved in favour of Bulgaria at the 2007 EU Summit in Lisbon, allowing Bulgaria to use the Cyrillic spelling евро on all official EU documents.

The date of accession, 1 January 2007, was set at the Thessaloniki Summit in 2003 and confirmed in Brussels on 18 June 2004. Bulgaria, Romania and the EU-25 signed the Treaty of Accession on 25 April 2005 at Luxembourg's Neumuenster Abbey.

The 26 September 2006 monitoring report of the European Commission confirmed the entry date as 1 January 2007. The last instrument of ratification of the Treaty of Accession was deposited with the Italian government on 20 December 2006 thereby ensuring it came into force on 1 January 2007.

The Treaty of Lisbon (initially known as the Reform Treaty) is an international agreement that amends the two treaties which form the constitutional basis of the European Union (EU). The Treaty of Lisbon was signed by the EU member states on 13 December 2007, and entered into force on 1 December 2009. It amends the Maastricht Treaty (1992), known in updated form as the Treaty on European Union (2007) or TEU, and the Treaty of Rome (1957), known in updated form as the Treaty on the Functioning of the European Union (2007) or TFEU. It also amends the attached treaty protocols as well as the Treaty establishing the European Atomic Energy Community (EURATOM).

At the meeting of the European Council in October 2007, Portugal insisted that the Treaty (then called the 'Reform Treaty') be signed in Lisbon, the Portuguese capital. This request was granted, and the Treaty was thus to be called the Treaty of Lisbon, in line with the tradition of European Union treaties. The Portuguese presidency was appointed to the job of organising the programme for a signing ceremony.

The signing of the Treaty of Lisbon took place in Lisbon, Portugal on 13 December 2007. The Government of Portugal, by virtue of holding Presidency of the Council of the European Union at the time, arranged a ceremony inside the 15th-century Jerónimos Monastery, the same place Portugal's treaty of accession to the European Union (EU) was signed in 1985. Representatives from the 27 EU member states were present, and signed the Treaty as plenipotentiaries, marking the end of treaty negotiations. In addition, for the first time an EU treaty was also signed by the presidents of the three main EU institutions.

Prime Minister Gordon Brown of the United Kingdom did not take part in the main ceremony, and instead signed the treaty separately a number of hours after the other delegates. A requirement to appear before a committee of British MPs was cited as the reason for his absence.

On 20 February 2008, the European Parliament voted in favour of a non-binding resolution endorsing the Lisbon Treaty by 525 votes in favour and 115 against, on the basis of an analysis of the treaty's implications by the Parliament's rapporteurs Richard Corbett and Inigo Mendez de Vigo. They had been the Parliament's rapporteurs on the constitutional treaty.

All EU member states had to ratify the Treaty before it could enter into law. A national ratification was completed and registered when the instruments of ratification were lodged with the Government of Italy. The month following the deposition of the last national ratification saw the Treaty enter into force across the EU.

Under the original timetable set by the German Presidency of the Council of the European Union in the first half of 2007, the Treaty was initially scheduled to be fully ratified by the end of 2008, thus entering into force on 1 January 2009. This plan failed however, primarily due to the initial rejection of the Treaty in 2008 by the Irish electorate in a referendum, a decision which was reversed in a second referendum in October 2009. Ireland, as required by its constitution, was the only member state to hold referendums on the Treaty. In the UK, the European Union (Amendment) Bill was debated in the House of Commons on 21 January 2008, and passed its second reading that day by a vote of 362 to 224; Prime Minister Gordon Brown was absent that day; the Bill was proposed to the Commons by David Miliband. The Czech instrument of ratification was the last to be deposited in Rome on 13 November 2009. Therefore, the Treaty of Lisbon entered into force on 1 December 2009.

After Lisbon, We Go Back to the Present Day: 2009-2019 Brexit