This might help answer your question ,turbo:


From the ASX guidance notes:

Not all exchanges, however, are as accommodating as ASX when it comes to granting disclosure-related trading halts and voluntary suspensions. 

If an entity’s securities will be trading on another exchange while they are in a trading halt or voluntary suspension on ASX and the entity is not able to obtain an equivalent halt or suspension on that exchange, it may be appropriate for it to publish a notice to that exchange indicating that an announcement is pending and investors should be wary of buying or selling securities ahead of that announcement.