Can the seller be also liable - Duty of Care?
Clearly says apart from B doubles, you can't tow more than one trailer - a B double combination is defined under the road traffic act (I'll find it later) and a B double combination excludes the use of a pig trailer behind a pig trailer, so back to needing a permit to do so which we know is possible although very rare.
And Bigbjorn - yes, that guy in Mildura tows a boat behind a caravan. It can be done, but you need engineering and appropriate licences which thankfully excludes most of the muppets out there towing their vans around. :)
Can the seller be also liable - Duty of Care?
VicRoads aren't hard to deal with at all - if you make yourself familiar with the rules and have all your ducks in a row, they are very easy to deal with - I've registers all sorts of things that were supposed to be difficult - I just made sure I had all the paperwork they wanted BEFORE attending. Those that find them hard to deal with are usually under prepared or trying to get something dodgy past them.
This rig in question was fully engineered so I'm guessing the brakes do what they need to do and it would have had to pass a brake test and swerve test to obtain a VASS so speculating on its potential flaws and dangers is just an uninformed guess unless your a VASS authorised Engineer yourself? No? Thought not...
People are always so quick to dismiss other people's ideas and tear them down just because they think they know better. I like this setup - the owner has obviously gone to great lengths to make it legal and safe but that's not good enough for some reason.
Or is it that he drives a Land Cruiser maybe... ;)