What requirements must a country meet in order to be member of the European union?

To become a member of the European Union (EU), a country must meet the Copenhagen criteria, which are the political, economic, and legal requirements that a country must satisfy in order to be eligible for EU membership. These criteria were established at the 1993 Copenhagen European Council and are outlined in Article 49 of the Treaty on European Union. The criteria are as follows:

1. Political criteria:

* A stable democracy with respect for human rights, the rule of law, and the protection of minorities

* A functioning market economy with the capacity to compete within the EU's single market

* The ability to adopt and implement the EU's acquis communautaire, which is the body of EU law and policies

2. Economic criteria:

* A sustainable market economy with a low level of inflation and a stable currency

* A budget deficit of no more than 3% of GDP and public debt of no more than 60% of GDP

* A balance of payments deficit that is not excessive

3. Legal criteria:

* The ability to take on the obligations of membership, including the adoption and implementation of the EU's acquis communautaire

* The ability to participate effectively in the EU's decision-making process

In addition to these criteria, a candidate country must also have the support of all existing EU member states. This means that each member state must agree to the country's accession to the EU.

The process of EU enlargement is typically long and complex, as it requires the candidate country to make significant changes to its political, economic, and legal systems. The process can take several years, and there is no guarantee that a candidate country will ultimately be successful.