This page has the laws for the State of North Carolina Regarding Automotive Window Film Installation.

All Cars (Includes 2 and 4 Doors)

32% Net. Which means 35% on ALL windows, including any side windows and the back glass.

Trucks

If it is Regular Cab it is 35% on ALL windows, if it is Extended Cab which includes King Cabs, Crew Cabs, and Super Dutys, 35% on Driver and Passenger Door, anything behind the Driver and Passenger door can be darker.

SUV's and Mini Vans

Driver and Passenger Doors are 35% and anything behind them can be darker.

Front Windshield

You can have a 5" sunstrip across the windshield. You CANNOT tint the entire windshield in ANY film.