East Timorese nationality law is regulated by the 2002 Constitution, the Nationality Act of the same year, the regulation of the Nationality Act Decree-Law No. 1 of 2004, as well as various international agreements to which East Timor has been a signatory.[1] These laws determine who is, or is eligible to be, a national of East Timor.[2] The legal means to acquire nationality and formal membership in a nation differ from the relationship of rights and obligations between a national and the nation, known as citizenship.[3][4][5] East Timorese nationality is typically obtained either on the principle of jus soli, i.e. by birth in East Timor; or under the rules of jus sanguinis, i.e. by birth abroad to at least one parent with East Timorese nationality. It can also be granted to a permanent resident who has lived in East Timor for a given period of time through naturalization.[2]