There is no common EU policy on the acquisition of European citizenship as it is supplementary to national citizenship. (EC citizenship was initially granted to all nationals of European Community member states in 1994 by the Maastricht treaty concluded between the member states of the European community under international law, this changed into citizenship of the European Union in 2007 when the European Community changed its legal identity to be the European Union. Many more people became EU citizens when each new EU member state was added and, at each point, all the existing member states ratified the adjustments to the treaties to allow the creation of those extra citizenship rights for the individual. European citizenship is also generally granted at the same time as national citizenship is granted).
Article 20 (1) of the
Treaty on the Functioning of the European Union states that: "Citizenship of the Union is hereby established. Every person holding the nationality of a Member State shall be a citizen of the Union. Citizenship of the Union shall be additional to and not replace national citizenship." While nationals of Member States are citizens of the union, "It is for each Member State, having due regard to Union law, to lay down the conditions for the acquisition and loss of nationality." As a result, there is a great variety in rules and practices with regard to the acquisition and loss of citizenship in EU member states. Applying for citizenship can be complex and may require instructing a specialist lawyer. The lack of
harmonisation for
naturalisation of non-EU citizens has been criticised.
Exceptions for overseas territories In practice this means that a member state may withhold EU citizenship from certain groups of citizens, most commonly in
overseas territories of member states outside the EU. A previous example was for the United Kingdom. Owing to the complexity of
British nationality law, a 1982 declaration by Her Majesty's Government defined who would be deemed to be a British "national" for European Union purposes: •
British citizens, as defined by Part I of the
British Nationality Act 1981. •
British subjects, within the meaning of Part IV of the
British Nationality Act 1981, but only if they also possessed the 'right of abode' under British immigration law. •
British overseas territories citizens who derived their citizenship by a connection to
Gibraltar. This declaration therefore excluded from EU citizenship various historic categories of British citizenship generally associated with former British colonies, such as
British Overseas Citizens,
British Nationals (Overseas),
British protected persons and any
British subject who did not have the 'right of abode' under British immigration law. In 2002, with the passing of the
British Overseas Territories Act 2002, EU citizenship was extended to almost all British overseas territories citizens when they were automatically granted full British citizenship (with the exception of those with an association to the British sovereign base areas of
Akrotiri and Dhekelia on the Island of Cyprus). This had effectively granted them full EU citizenship rights, including free movement rights, although only residents of
Gibraltar had the right to vote in European Parliament elections. In contrast,
British citizens in the
Crown Dependencies of
Jersey,
Guernsey and the
Isle of Man had always been considered to be EU citizens but, unlike residents of the
British overseas territories, were prohibited from exercising EU free movement rights under the terms of the British Accession Treaty if they had no other connection with the UK (e.g. they had lived in the UK for five years, were born in the UK, or had parents or grandparents born in the UK) and had no EU voting rights. (see
Guernsey passport,
Isle of Man passport,
Jersey passport). Another example are the residents of
Faroe Islands of Denmark who, though in possession of full Danish citizenship, are outside the EU and are explicitly excluded from EU citizenship under the terms of the Danish Accession Treaty. This is in contrast to residents of the Danish territory of
Greenland who, whilst also outside the EU as a result of the 1984
Greenland Treaty, do receive EU citizenship as this was not specifically excluded by the terms of that treaty (see
Faroe Islands and the European Union;
Greenland and the European Union).
Greenland Although Greenland
withdrew from the
European Communities in 1985, the
autonomous territory within the
Kingdom of Denmark remains associated with the
European Union, being one of the
overseas countries and territories of the EU. The relationship with the EU means that all
Danish citizens, where citizens of Greenland are
citizens of Denmark, residing in
Greenland are EU citizens. This allows Greenlanders to move and reside freely within the EU. This contrasts with Danish citizens living in the
Faroe Islands who are excluded from EU citizenship.
Summary of member states' nationality laws This is a summary of nationality laws for each of the twenty-seven EU member states as of December 2017.
Availability to people with European ancestry Given the substantial number of Europeans who emigrated throughout the world in the 19th and 20th centuries, and the extension of citizenship by descent, or
jus sanguinis, by some EU member states to an unlimited number of generations of those emigrants' descendants, there are potentially many tens of millions or even hundreds of millions of people currently outside Europe who have a claim to citizenship in an EU member state and, by extension, to EU citizenship. There have also been extensive debates in European national legislatures on whether, and to what extent, to modify nationality laws of a number of countries to further extend citizenship to these groups of ethnic descendants, potentially dramatically increasing the pool of EU citizens further. ==Loss of EU citizenship due to member state withdrawal==