||The purpose of this Bill is to facilitate Western Australia's part in a nation-wide change in the geographical datum used in Australia. A datum is a reference system that defines the location of features commonly shown on maps. There is more than one system in existence. Each system is based on a particular model of the earth. The effect of this Bill is to remove references to a specific datum in Western Australian legislation. When a reference to a datum is required, that datum will be prescribed by regulations rather than specified within the Act itself. Therefore, any new datum can be adopted by regulations, which will be far more efficient in terms of cost and time than regular legislative changes.