Succession to the Bruneian throne is guided by the Succession and Regency Proclamation within the Constitution of Brunei first established in 1959. The succession laws have been amended several times since then and the most recent update was published in 2022.
According to the constitution, heirs must be legitimate, male, Muslim, and descended from Muhammad Jamalul Alam II, the 26th Sultan of Brunei. The line of succession follows agnatic primogeniture. Preference was previously given to sons whose mother was also royal but this was repealed in an amendment on 4 September 2021.
The heir presumptive is given the title . It is possible for an heir presumptive to be displaced by someone with a better claim to the throne. If an heir apparent is proclaimed they are given the title and they cannot be displaced. The current sultan's oldest son, Al-Muhtadee Billah was installed as the Crown Prince in August 1998 meaning he has been chosen to succeed his father.