Australia Post has strict licensing on it's data products, including the Postal Address File (the authoritative list of postal addresses in Australia) and the official postcode/locality list.
Recently they have tightened the licencing on their data which will no doubt lead to less individuals and businesses using it and hence more poor decisions about peoples locations and their addresses will be made.
As Australia Post is owned by the Dept of Communications, the Dept has the authority to make this data available.
It would also correct the issue right now in G-NAF where most addresses don't have a postcode due Australia Post and PSMA historically not being able to reach an agreement on the use of the postcode data (even though PAF is part of G-NAF!)
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