That's only because of Uber's interpretation. From the FT article:
> California law defines an autonomous vehicle as one that is able to drive “without the active physical control or monitoring by a human operator”.
> Anthony Levandowski, a former Google engineer who leads Uber’s driverless car efforts, said the fleet would be “self-driving” but not “autonomous”, making an unusual semantic distinction.
A pretty tenuous way of avoiding regulations if you ask me.