Apparently, this was overseen by the Department of Home Affairs. The recently appointed PM of Australia (Scott Morrison) used to be the Minister for Home Affairs. His new appointment to the role (Peter Dutton) was one of the primary instigators in the recent power exchange (he actually wanted the top job for himself, but lost the party vote).
Considering the history of both of these men, I predict a grim history for Australia's privacy related laws. They're both staunchly pro-surveillance, anti-immigration (to the point of racism) and, I suspect, highly corrupt. I know that last statement is accusative, but Peter Dutton is currently embroiled in a situation where he released a French au pair and her partner from immigration detention because (allegedly) her prospective employer's second cousin lobbied the government to do so, and that family has donated large amounts of funds to the party. Meanwhile, others are held in sub-human conditions purely for trying to arrive in Australia as refugees, by boat. This situation is unfolding right now, but I doubt there will be any fallout.
Australia's current leadership was not voted in by the population of the country (as seems to be the trend for the last few years, no matter who you voted for), and seems to be set on an anti-privacy, liberty-destroying, nationalist agenda.
As an Australian, I'm incredibly embarrassed by all involved.