NH has similar restrictions for front glass, but there's a way around it. A doctor's note and the proper state paperwork.
You have to have a diagnosis for light sensitivity (photophobia) and have a licensed MD complete the application.
Seems to be an epidemic in NH and MA. Every other tuner, BMW, Mercedes has limo tint front to back.
I'll admit it looks cool, but I think it's a safety issue if you can't see other drivers.