In Australia, the area managed by a District Government is defined as a Local Government Area (LGA). In Australia, the LGAs are the identified as "Administrative Level 6" in OpenStreetMap.
Details for on the common Administrative Levels used worldwide are available here:
District Label is a shortened version of the full LGA name that can be used in space constrained user interfaces e.g. web pages. It must be all lowercase and be 10 characters or less.
District Labels can be used by themselves (e.g. sydney) only if there is no ambiguity, otherwise they should be used with prefix and suffix added (e.g. g_sydney_aunsw).
If possible. always use a District Label with prefix and suffix:
a type prefix g_ to standard for government
a region suffix consisting of its Region Label e.g. aunsw
For example:
g_sydney_aunsw
g_wyndhameastkimberley_auwa
In Australia the Local Government Areas change quite often, so District Labels should not be used when consistency over time is required (Cell Labels can be used instead).