Brunei–Malaysia border which are defined by agreements, from west to east, are as follows: Brunei and Malaysia in an Exchange of Letters on 16 March 2009, agreed to affirm the five agreements. The two countries also agreed to use the watershed principle to determine the remaining undelimited portions of the border. Brunei's maritime boundary with Malaysia until the 100 fathom isobath was inherited from the Sarawak (Definition of Boundaries) Order in Council 1958 No 1518 and the North Borneo (Definition of Boundaries) Order in Council 1958 No 1517, both of which defined the boundary between Brunei on the one hand, and Sarawak
Brunei particularly religious schools, and also in institutes of higher learning. As of 2004, there are six Arabic schools and one religious teachers' college in Brunei. A majority of Brunei's Muslim population has had some form of formal or informal education in the reading, writing and pronunciation of the Arabic language as part of their religious education. The culture of Brunei is predominantly Malay (reflecting its ethnicity), with heavy influences from Islam, but is seen as much more conservative than Indonesia and Malaysia. Influences to Bruneian culture come from the Malay cultures of the Malay Archipelago. Four periods of cultural influence