Many stateless permanent residents live in Brunei. Most have lived on Bruneian soil for generations, but Bruneian nationality is governed by the policy of "jus sanguinis"; the right to hold it comes from blood ties. The government of Brunei has made obtaining citizenship possible, albeit difficult, for stateless people who have inhabited Brunei for many generations. Requirements include rigorous tests in Malay culture, customs, and language. Stateless permanent residents of Brunei are given an International Certificate of Identity, which allows them to travel overseas. The majority of Brunei's Chinese and Indians are permanent residents.