G'day,
Forget about s118 of the Evidence Act (attached) for a minute. That's 'legal professional privilege - 101' stuff. If that request has been made by ASX legal department that is very embarrassing. It has to be a gee up, surely? You simply can't get it that wrong.
http://www.austlii.edu.au/cgi-bin/viewdoc/au/legis/cth/consol_act/ea199580/s118.html