"d. the shutting down of the Census website on the evening of 9 August 2016, the factors leading to that shutdown and the reasons given, and the support provided by government agencies, including the Australian Signals Directorate;" From: Terms of Reference.I suggest the Australian Computer Society (ACS) join with Internet Australia (the Australian Chapter of the Internet Society) on this and try to widen the discussion to cover Internet security more generally. ACS and IA need not agree on every aspect, buy could loosely coordinate, as was done for the Internet regulation inquiries of the 1990s, as described by Chen (2000, p. 161).
ReferenceChen, P. J. (2000). Australia's online censorship regime: the Advocacy Coalition Framework and governance compared. Retrieved from