auDA really doesn't do much enforcement of this, at all. The policy might aswell not exist.
Not surprising, considering there are at least 4 auDA accredited registrars who specialise in domain parking[1], which is (allegedly) against the rules.
[1] https://www.auda.org.au/accredited-registrars - see drop.com.au, terrific.com.au, yexa.com.au, fabulous.com.au
Here are a few examples, all definitely parked domains - but auDA allows it:
television.com.au
bank.com.au
remotecontrols.com.au
modem.com.au
tweet.com.au
homephone.com.au
homepage.com.au (This domain is for sale, $80k)
It would be great if auDA enforced their policy...