Ni-Vanuatu nationality law is regulated by the 1980 Constitution of Vanuatu, as amended; the 1980 Citizenship Act, and its revisions; and various international agreements to which the country is a signatory.[1][2][3] These laws determine who is, or is eligible to be, a national of Vanuatu. Ni-Vanuatu nationality is typically obtained under the principle of jus sanguinis, i.e. by birth in Vanuatu or abroad to parents with ni-Vanuatu nationality.[4] It can be granted to persons with an affiliation to the country, or to a permanent resident who has lived in the country for a given period of time through naturalisation.[5] Vanuatu has had several programs that grant honorary citizenship by investment.[6] Nationality establishes one's international legal identity as a member of a sovereign nation.[7] Though it is not synonymous with citizenship, for rights granted under domestic law for domestic purposes, the United Kingdom, and thus the commonwealth, have traditionally used the words interchangeably.[8][9]