. Pass in front of a person in prayer and non-Muslims should not handle the Koran, the holy book of Islam, when visiting the mosques.
2. Eat or drink in front of Bruneian Muslims in daylight during Ramadan, an annual holy month for Muslims.
3. Smack the fist of your right hand into your left palm.
4. Offer alcoholic beverages to Bruneian Muslims and must be consumed privately in your hotel room.
5. Insult or speak badly of the Sultan of Brunei or the Royal family.