National definition of waste
Waste is defined as any matter prescribed to be scheduled waste, or any matter whether in a solid, semi-solid or liquid form, or in the form of gas or vapour which is emitted, discharged or deposited in the environment in such volume, composition or manner as to cause pollution.
National definition of hazardous waste
Hazardous waste is also identified as "Scheduled Wastes", which is defined as any waste falling within the categories of waste listed in the Fourth Schedule of the Draft Pollution Control Order of Negara Brunei Darussalam.