My 72' Blazer has MAJOR tint on it...so being a real genius I asked my opthamologist (that's EYE DOCTOR for you country folks) to write me a note on his letterhead stating I needed tint, which he did.
2 years later I got pulled over, whipped out my little note, and was told that
1) It wasn't from an "M.D"
2) For it to mean anything, the doctor has to send forms to the Secretary of State wheer they issue a handicap thingie
3) It needs to be renewed every 6 months
Wally...I got pulled over in Morton Grove. Bastards were issuing tint tickets all morning they said.....

Had the ticket pre-made out, just had to fill in my name and particulars.