Got my email reply already, copy the link and scroll down until you find this extract. (About 3/4 of the way down).
"Members who hold at least 5% of the votes that may be cast at a general meeting of the company have the power to: •call and hold a meeting themselves, or
•require the directors to call and hold a meeting."
http://www.asic.gov.au/asic/ASIC.NSF/byHeadline/Members .