Maltese nationality law details the conditions by which a person is a national of Malta. The primary law governing nationality regulations is the Maltese Citizenship Act, which came into force on 21 September 1964. Malta is a member state of the European Union (EU) and all Maltese nationals are EU citizens. They have automatic and permanent permission to live and work in any EU or European Free Trade Association (EFTA) country and may vote in elections to the European Parliament. All persons born in Malta between 21 September 1964 and 1 August 1989 automatically received citizenship at birth regardless of the nationalities of their parents. Individuals born in the country since that date receive Maltese citizenship at birth if at least one of their parents is a Maltese citizen or was born in Malta. Foreign nationals may become Maltese citizens by naturalisation after meeting a minimum residence requirement (usually five years). Individuals who make a substantial financial investment in the state are eligible for a facilitated naturalisation with a shortened residence period. Malta was previously a colony of the British Empire and local residents were British subjects. Although Malta gained independence in 1964 and Maltese citizens no longer hold British nationality, they continue to have favoured status when residing in the United Kingdom; as Commonwealth citizens, they are eligible to vote in UK elections and serve in public office there. The distinction between the meaning of the terms citizenship and nationality is not always clear in the English language and differs by country. Generally, nationality refers to a person's legal belonging to a sovereign state and is the common term used in international treaties when addressing members of a country, while citizenship usually means the set of rights and duties a person has in that nation. This distinction is clearly defined in non-English speaking countries but not in the Anglosphere. In Maltese legislation, the term "citizenship" (ċittadin) is used to refer to state membership.