a while back i heard someone somewhere say (can't recall details except that that person would most likely know what he was talking about) that avz can't be removed from asx *unless* they have done something fraudulent / illegal.
also, i'm pretty sure that there is no upper limit set in regards to the lenght of time of suspension.
the very first result from a google search for "asx rules for delisting" is a 5 page pdf file, below is a screenshot of the last page:
AVZ Price at posting:
78.0¢ Sentiment: Hold Disclosure: Held