Mining the Market, Again, page-17

If it is an SPP (SHAREHOLDERS purchase plane ) then as long as you buy in and are on the register before the record date you can still participate.
The 'trading halt' itself does not signify cut off.

And as Lockit pointed out
If the offer, is an offer to sophs and Instos only, then You have a bunch of 'Non-holders' and 'holders' that Get the chance to buy millions of shares and general shareholders miss out .