can centro trade tomorrow or must th be called, page-6

So long as the stock is obeying the listing rules they can trade indefinitely. They are also required to adhere to continuous disclosure rules for information released to the market.

They are under no obligation to request a trading halt. Companies tend to do this if they need more time, are worried that a leak may occur or if something major is unfolding.

They can request up to 48h trading halt without too many questions from the ASX and longer by approval.

If it's any help, all of the info is on the ASX website and well worth a read.