Statistical division
Statistical divisions are designed to be relatively homogeneous regions, characterised by identifiable social and economic links between the inhabitants and the economic units within the region under the unifying influence of one or more major towns or cities.
Capital city statistical divisions are delineated to embrace the area expected to contain the urban development of the city (and associated urban areas) for a period of at least twenty years.
Statistical divisions are represented by a two digit numeric code which starts at 05 and jumps in steps of five within each State/ Territory. The gaps are to allow for future expansion. The code 85 has been allocated to 'Off-Shore and Migratory' in each State and the Northern Territory.