(I'm also in NSW)-- The list of "support requests" on the customers page suggests that the tools are used only in accordance with duly-issued warrants. Access would need to be removed once the purpose of the warrant had been fulfilled, but we may never know whether they get that right in practice. Ben Grubb has collated some background information on the operation of those laws.[1]
[1] http://www.smh.com.au/it-pro/government-it/nsw-police-use-ha...