Presumably the same way you would back up the assumption that it will work, preconceived notions on the effects of regulations in general?
EDIT: I have now read the article and would like to retract my guess that it will make no difference. It says that this will "require that the system be 'open' to remote access by 'authorized' third parties at any time". That's absolutely catastrophic and will almost certainly kill people.
Do you not think that the existing technology that is deployed in real cars is actually working?