Indonesian nationality law  The Indonesian nationality law is a law regulating about who an Indonesian citizen is, the requirements and how to obtain Indonesian citizenship, the loss of Indonesian citizenship, the requirements and how to re-obtain Indonesian citizenship, and the penal provision. The nationality law is stated in Constitution of Indonesia. The Indonesian nationality law is based on jus sanguinis and jus soli. The latest law regulating Indonesian nationality is Law No. 12/2006 (UU No. 12 Tahun 2006). This law revokes Law No. 62/1958 (UU No. 62 Tahun 1958). Generally, Indonesian citizens are those natural Indonesian people and those of other nationalities that are endorsed by the law as Indonesian citizens. The Indonesian nationality law does not recognize dual citizenship except for persons under the age of 18. By that age those who have not chosen their citizenship have to acquire an affidavit (, Limited Dual Indonesian Citizen Passport) in order to retain both citizenship. After reaching the age of 21, they must choose one citizenship. Historically, Indonesia has previously permitted dual nationality, as evidence by the Sino-Indonesian Dual Nationality Treaty that lasted from 1960 to 1980. The Indonesian government announced on 13 February 2020 that all nationals who have joined the terrorist group ISIL automatically lose their Indonesian citizenship the instant they joined, leaving them stateless as Indonesia does not recognize dual nationality apart from the above circumstances. Indonesia also refuses to repatriate ISIL fighters captured in Syria as their citizenship is now revoked. An Indonesian citizen is:  A foreign citizen can apply to become an Indonesian citizen with the following requirements:  Any application for citizenship is granted by the President of Indonesia. This could happen if:  In 2018, Indonesian citizens had visa-free or visa on arrival access to 70 countries and territories, ranking the Indonesian passport 69th in the world according to the Visa Restrictions Index.