You are allowed 50% light transmission +/- 3%. This is including any factory tint you may have had. The shop who does your windows will have to test this so they know how much to add.
If you have any more questions, just ask, as the information Trooper is only a shout away.
BTW, I would think most any shop can tint almost any percentage you want.
And yes, the previous owner ("CYS") of my SVT had to sign a waiver when he got his tint and it was in his best interest to tell me about it when I bought it. I would think any reputable shop in the interest of lowsuit-avoidance would do the same.
Also, there is nothing allowed on the front windhshield at all. If it comes that way from the factory, then fine. Anything other than that on the front facing glass is illegal, regardless of shade, size or color.
John Herrick
MN State Patrol
