shareholder meeting, page-7

It's 5%:

Individual 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.


Meetings may be held regularly or to resolve specific questions about the management or business of the company. The process to be followed in calling meetings, conducting meetings, and voting at meetings is in Part 2G.2 of the Corporations Act 2001.

http://www.asic.gov.au/asic/asic.nsf/byheadline/Members?openDocument