If you lose it for having all your demerit points used up, they only suspend your license depending on what you lost it for, and only add another 3 month extra onto your probationary period, as well taking your license for the original infringement which cause you to lose the demerit points, and add 3 months of suspension ontop.
I got done for speeding 30 over, but 35 under and copped a 1 month suspension and lost 4 points.... only have 1 left for 12 months... they sent me this booklet and it has all your options in it for when (if) you lose all your demerit points, you can keep driving but if you get caught 1 more time they take your license for the original time and add 6 months onto it