Further to my original response (below), I’d like to make a couple of additional points.
Firstly, my tactic in this case would be to hit the landlord and illegal parkers with breaches for everything all at once.
Take the landlord to Fair Trading (mediation with a view to getting NCAT orders) for failure to put the the head tenants name on the strata roll. Hit the head tenant for the same thing with the sub-tenants.
Hit the landlord for failure to control the behaviour of their tenants. Put “Move it or we will” posters on the illegally parked cars (the new version can be downloaded HERE).
And before you do anything, get professional advice from one of our sponsors – StrataAnswers or Sachs Gerace Lawyers.