Really great reference site for PA tint laws
 

i'm not sure how up to date this is, but it is very thorough:

http://www.berksweb.com/users/dmv/tint/legal.html

And it has me pretty convinced that any tint that allows you to see inside the vehicle is technically legal :supz:

Only PENNDot says that 70% is the rule, and a police station isn't exactly an inspection station so there nya.