The UC/L Structure is defined at Population Census times only. It comprises in ascending hierarchical order: CDs-Urban Centres/Localities.
CDs within this structure are confined to those within defined Urban Centre and Locality boundaries. As a consequence, Urban Centres and Localities aggregate to cover only part of a state or territory and thus the structure covers part of Australia only.
Urban Centres may be bisected by an S/T boundary. Where this occurs each portion of the urban centre is separately identified and is included in the Urban Centre/Locality Structure for the relevant S/T. For example, the urban centre of Albury-Wodonga is partly in New South Wales and partly in Victoria. One part is shown under New South Wales and the other under Victoria.
Urban Centres and Localities are delimited by the use of actual population counts after each Census is conducted. The Urban Centres and Localities determined following the 2006 Census are listed in the publication Statistical Geography: Volume 3 - Australian Standard Geographical Classification (ASGC) Urban Centres/Localities, 2006 (cat. no. 2909.0).
In this table, Urban Centre and Locality names are listed alphabetically and UC/L codes are arranged in ascending numerical order within each S/T. The suffix (L) is shown after Locality names to distinguish Localities from Urban Centres.