trading halt, page-37

This article from moneymanagement.com.au might provide some insight into the pending announcement: (released 2 hours ago)

Volatility brings regulatory flaws into focus
The Federal Government is being placed under pressure to further amend the regulatory environment covering the financial services industry in the face of executive directors of publicly-listed companies facing margin calls and broking houses failing to settle. Spokesmen with the accounting, funds management and financial planning industries have all expressed concern at the events that have occurred in Australia since the beginning of the year, including directors in publicly-listed companies such as MFS Limited and Allco Finance being subject to margin calls and Tricom Equities being unable to settle trades.