Naturalization is the legal act or process by which a non-national of a country acquires the nationality of that country after birth. The definition of naturalization by the International Organization for Migration of the United Nations excludes citizenship that is automatically acquired or is acquired by declaration. Naturalization usually involves an application or a motion and approval by legal authorities. The rules of naturalization vary from country to country but typically include a promise to obey and uphold that country's laws and taking and subscribing to an oath of allegiance, and may specify other requirements such as a minimum legal residency and adequate knowledge of the national dominant language or culture. To counter multiple citizenship, some countries require that applicants for naturalization renounce any other citizenship that they currently hold, but whether this renunciation actually causes loss of original citizenship, as seen by the host country and by the original country, will depend on the laws of the countries involved.
Nationality law is the law of a sovereign state, and of each of its jurisdictions, that defines the legal manner in which a national identity is acquired and how it may be lost. In international law, the legal means to acquire nationality and formal membership in a nation are separated from the relationship between a national and the nation, known as citizenship. Some nations domestically use the terms interchangeably, though by the 20th century, nationality had commonly come to mean the status of belonging to a particular nation with no regard to the type of governance which established a relationship between the nation and its people. In law, nationality describes the relationship of a national to the state under international law and citizenship describes the relationship of a citizen within the state under domestic statutes. Different regulatory agencies monitor legal compliance for nationality and citizenship. A person in a country of which he or she is not a national is generally regarded by that country as a foreigner or alien. A person who has no recognised nationality to any jurisdiction is regarded as stateless.
Swedish nationality law determines entitlement to Swedish citizenship. Citizenship of Sweden is based primarily on the principle of jus sanguinis. In other words, citizenship is conferred primarily by birth to a Swedish parent, irrespective of place of birth.
The citizenship law of the Czech Republic is based on the principles of jus sanguinis or "right by blood". In other words, descent from a Czech parent is the primary method of acquiring Czech citizenship. Birth on Czech territory without a Czech parent is in itself insufficient for the conferral of Czech citizenship. Every Czech citizen is also a citizen of the European Union. The law came into effect on 1 January 1993, the date of the dissolution of Czechoslovakia, and has been amended in 1993, 1995, 1996, 1999, 2002, 2003, and 2005. Since 1 January 2014, multiple citizenship under Czech law is allowed.
Polish nationality law is based primarily on the principle of jus sanguinis. Children born to at least one Polish parent acquire Polish citizenship irrespective of place of birth. Besides other things, Polish citizenship entitles the person to a Polish passport.
Slovenian nationality law is based primarily on the principles of jus sanguinis, in that descent from a Slovenian parent is the primary basis for acquisition of Slovenian citizenship. However, although children born to foreign parents in Slovenia do not acquire Slovenian citizenship on the basis of birthplace, place of birth is relevant for determining whether the child of Slovenian parents acquires citizenship.
Hungarian nationality law is based on the principles of jus sanguinis. Hungarian citizenship can be acquired by descent from a Hungarian parent, or by naturalisation. A person born in Hungary to foreign parents does not generally acquire Hungarian citizenship. A Hungarian citizen is also a citizen of the European Union.
A Belarusian passport is issued to citizens of Belarus and is used for both external and internal travel. Unlike Russia, there are no internal passports in Belarus. Passports are issued by the Ministry of Internal Affairs in Belarus and by the Ministry of Foreign Affairs to citizens who live abroad.
Japanese Nationality Law details the conditions by which a person holds nationality of Japan. The primary law governing nationality regulations is the 1950 Nationality Act.
Nationality law of Greece is based on the principle of jus sanguinis. Greek citizenship may be acquired by descent or through naturalization. Greek law permits dual citizenship. A Greek national is a citizen of the European Union, and therefore entitled to the same rights as other EU citizens.
Lithuanian nationality law operates on the jus sanguinus principle, whereby persons who have a claim to Lithuanian ancestry, either through parents, grandparents, great-grandparents may claim Lithuanian nationality. Citizenship may also be granted by naturalization. Naturalization requires a residency period, an examination in the Lithuanian language, examination results demonstrating familiarity with the Lithuanian Constitution, a demonstrated means of support, and an oath of loyalty. A right of return clause was included in the 1991 constitution for persons who left Lithuania after the Soviet occupation in 1940 and their descendants. Lithuanian citizens are also citizens of the European Union and thus enjoy rights of free movement and have the right to vote in elections for the European Parliament.
Estonian citizenship law details the conditions by which a person is a citizen of Estonia. The primary law currently governing these requirements is the Citizenship Act, which came into force on 1 April 1995.
Ukrainian nationality law details the conditions by which a person holds nationality of Ukraine. The primary law governing these requirements is the law "On Citizenship of Ukraine", which came into force on 1 March 2001.
Russian citizenship law details the conditions by which a person holds citizenship of Russia. The primary law governing citizenship requirements is the federal law "On Citizenship of the Russian Federation", which came into force on 1 July 2002.
The Croatian nationality law dates back from June 26, 1991, with amendments on May 8, 1992, October 28, 2011, and January 1, 2020, and an interpretation of the Constitutional Court in 1993. It is based upon the Constitution of Croatia. It is mainly based on jus sanguinis.
Azerbaijani nationality law is regulated by the Constitution of Azerbaijan, as amended; the Citizenship Law of Azerbaijan and its revisions; and various international agreements to which the country is a signatory. These laws determine who is, or is eligible to be, an Azerbaijani national.
Multiple citizenship is a person's legal status in which a person is at the same time recognized by more than one country under its nationality and citizenship law as a national or citizen of that country. There is no international convention that determines the nationality or citizenship status of a person, which is consequently determined exclusively under national laws, that often conflict with each other, thus allowing for multiple citizenship situations to arise.
Slovak nationality law is the law governing the acquisition, transmission and loss of Slovak citizenship. The Citizenship Act is a law enacted by the National Council of Slovakia in regard to the nationality law following the dissolution of Czechoslovakia. In 2010, it was controversially amended, enacting loss of Slovak citizenship upon naturalization elsewhere. This was said to have affected the 2012 election to some degree.
Venezuelan nationality law is the law governing the acquisition, transmission and loss of Venezuelan citizenship. It is based on the principle of jus soli: any person born in Venezuela acquires Venezuelan citizenship at birth, irrespective of nationality or status of parents. Venezuelan nationality law is regulated by Section 1 of Chapter 2 of the Constitution of Venezuela and by the Nationality and Citizenship Act of 2004.
Soviet nationality and citizenship law controlled who was considered a citizen of the Union of Soviet Socialist Republics, and by extension, each of the Republics of the Soviet Union, during that country's existence. The nationality laws were only in rough form from about 1913 to 1923, taking more definite form in 1924. There were several major changes in the nationality law, especially in 1931, 1938, and 1978. Soviet law originally expanded the bounds of jus sanguinis and citizenship by residence more than was common among European countries, before tending to gradually retract from that over time. Soviet citizenship law was also used as a political tool to expand the number of Soviet citizens globally, increase military conscription pools, and punish dissenters or even entire ethnic groups.
