The legal limit in MN is 50%. The interesting thing is, the lightest tint they have is 50%, but on top of the factory tint this takes you over the legal limit. This is due to the fact that the tint is 50% of light transmission and thats off the factory tint which is about 70%. So if your gonna tint go dark. I have 30% and its still not dark enough. I havent been pulled over once yet and thats in about six months. I never had to sign a waiver for going over, the limit but i also have heard of people signing them, just depends on the place I guess. Theres more, but nothing a respectable tinting place cant answer.

1995 Red SE

30% Black window tint, KKM, Superchip, HID Xenon lows w/ 100W Ultra White High and 50W fogs, Mesh Grill, 17" Enkei RS5's rollin' on 215/45 R17 Pole Position SO-2's, Sony CD deck, Infinity Kappa's in the doors