Well it looks like we've been foiled this time, by the Fairfax publication where they mention Section 44 (v) of the Commonwealth of Australia Constitution Act of 1901.
What is Section 44 part five you may ask?
Why it is;
Disqualification of Any person who:
has any direct or indirect pecuniary interest in any agreement with the Public Service of the Commonwealth otherwise than as a member and in common with the other members of an incorporated company consisting of more than twenty-five persons;