David Leyonhjelm (NSW, Liberal Democratic Party) Share this | Hansard source

I would like to follow up on that. Clause 187A(4) does say:

This section does not require a service provider to keep, or cause to be kept:

(a) information that is the contents or substance of a communication;

I would like you, please, to clarify this. In the case of an email where the subject of the email is contained in the heading, is that equivalent to content or substance? In the case of an email where there is nothing in the heading, does the heading comprise the data to be retained? In other words, in what situations might an email be considered not content or substance?