Related question: If a driver kills someone and it's his fault, he will presumably get large fines or even go to jail. But if the same thing happens with a self-driving car, whose faul is it then? The owner of the car? The car company? It seems nobody is really at fault, mistakes are just bound to happen eventually, and a car company can't go to jail anyway.
The only level 3 system in production (that I'm aware of, at least) is Mercedes', and they have liability while the car is driving itself. It shifts back to the driver 10 seconds (IIRC) after the system notifies the driver he/she must take over.