The requirements to attain Brunei citizenship include passing tests in Malay culture, customs, and language as well as the national Malay Islamic Monarchy (MIB) philosophy. Stateless permanent residents of Brunei are given International Certificates of Identity, which allow them to travel overseas. The majority of ethnic Chinese in Brunei are permanent residents, and many are stateless. An amendment to the National Registration and Immigration Act of 2002 allowed female Bruneian citizens to transfer their nationality to their children. In May 2006, the law changed to allow citizenship to permanent residents who have contributed to the country's economic growth, to women married to a citizen for 2 years, to women married to permanent residents for 5 years, and to children of permanent resident fathers after the age of 2 years and 6 months.