The actually factory tint level on our cars is 18% tinted glass not a film but the actual glass is this dark..from the factory. That includes rear window, and both back passenger windows also.. I have my drivers side and passenger side windows in the front to match the tint perfectly. We have the same law about 35% in the front..I've been pulled over many times for speeding or whatever, never once has a single cop ever said anything about tint. They don't enforce it here..