Looking at http://www.leg.state.nv.us/register/2011Register/R084-11I.pd..., it looks like Nevada decided to define a class of license (G) for operation of autonomous vehicles. The CA legislation just makes operating an autonomous car legal if it meets certain safety and performance criteria, which it doesn't define (instead, asks the CHP to come up with these rules). The way this bill is drafted, it looks to me like CA would be much less restrictive of autonomous car operation than Nevada.