Antiguan and Barbudan nationality law is regulated by the 1981 Constitution of Antigua and Barbuda, the various Antigua and Barbuda Citizenship Acts, the Millennium Naturalisation Act of 2004, and various British Nationality laws.[1][2][3] These laws determine who is, or is eligible to be, a national of Antigua and Barbuda. Antiguan and Barbudan nationality is typically obtained either on the principle of jus soli, i.e. by birth in Antigua and Barbuda; or under the rules of jus sanguinis, i.e. by birth abroad to a parent with Antiguan or Barbudan nationality. It can also be granted to persons with an affiliation to the country, by investment in the country's development, or to a permanent resident who has lived in the country for a given period of time through naturalisation.[4] Nationality establishes one's international identity as a member of a sovereign nation.[5] Though it is not synonymous with citizenship, rights granted under domestic law for domestic purposes, the United Kingdom, and thus the commonwealth, has traditionally used the words interchangeably.[6]