Earlier quoted context omitted.
> The Telecommunications (Interception and Access) Act 1979 requires telecommunications companies to retain a particular set of telecommunications data for at least 2 years. That looks like metadata (see https://www.homeaffairs.gov.au/nat-security/files/dataset.pd... , PDF warning). Which is still private, but doesn't include your private calls and messages. How long do they keep private calls and messages?
> How long do they keep private calls and messages? 7-10 years, in practice. 2 years, in requirement. [0] [0] https://www.aph.gov.au/About_Parliament/Parliamentary_Depart...
> … is not defined in the TIA Act but is generally understood to refer to information about a communication that is not the content or substance of a communication.
I'm asking asking about content.