Every state has a law against this. Its in every drivers' manual in all states (left lane is passing only, if you're not moving past the slower traffic on the right then you're doing something illegal), its just that its not enforced and I think its ridiculous. I do a lot of long highway drives to go see my girlfriend and it is definitely the thing that annoys me the most.
2011 Synergy Green Metallic 1SS Camaro:
RS Package, White Ralley Stripes, Premium Sound.
Mods; Flowmaster Exhaust, Vararam CAI, Pfadt Sport Suspension, Budnik "Ice" Wheels, Nitto Invo tires
Upcoming Mods; Custom grill and badging.