Pancasila.. Five principles governing the political system in Indonesia.
Muslims constitute 87.2% of the population of Indonesia. Islamic law has a presence in Indonesian law, especially in personal status, inheritance, marriage, divorce, and others. Indonesia does not apply legal borders, with the exception of Aceh province, which gained autonomy allowing it to apply Islamic law, after signing a peace agreement that ended decades of armed conflict with the central government. The Constitution of Indonesia was adopted in 1945 and has remained in effect ever since.