No more Callbook?

[VK2CSW]

To me it feels like a Commonwealth department following procedures to protect it's IP (Intellectual Property) and preparing to licence the use of that data.

They own the information and if another organisation is reproducing the information without paying a licence fee then they need to take steps to make sure it is not being reproduced (it doesn't matter that the ACMA have it freely available - reproduction of IP is now a serious earner for the owner).