I second Moondyne's comments - nice work on these divisions.  Given that I work in Industrial Law I am aware of and thought you might like to know (and edit appropriately where you see fit) that there are still reasonably strong relationships between Industrial Award entitlements (particularly for State Awards across Australia) and some counties.  (Although the WorkChoices reforms are beginning to remove this relationship).

Anyway the boundaries of a county is sometimes used to define the exclusion or inclusion point as to whether workers are included or not in a particular award. There are a great many examples in many parts of Australia but to show you one, the NSW METAL, ENGINEERING AND ASSOCIATED INDUSTRIES (STATE) AWARD includes All persons employed in the industries and callings of ... etc... but excludes those persons if they are in the County of Yancowinna see here  for that example. I hope that assists?  talk