Papua New Guinean nationality law is regulated by the 1975 Constitution of Papua New Guinea, as amended; the Citizenship Act 1975, and its revisions; and international agreements entered into by the Papua New Guinean government.[1] These laws determine who is, or is eligible to be, a national of Papua New Guinea. The legal means to acquire nationality, formal legal membership in a nation, differ from the domestic relationship of rights and obligations between a national and the nation, known as citizenship.[2][3] Papua New Guinean nationality is typically obtained either on the principle of jus soli, i.e. by birth in Papua New Guinea or under the rules of jus sanguinis, i.e. by birth abroad to parents with Papua New Guinean nationality.[4] It can be granted to persons who have lived in the country for a specific period of time, who have contributed to the country's development, or who have an affiliation to the country through naturalization.[5]