Yes, each state is different. Ya here in PA none.
I still run 50 on front sides, 35 on rear sides and 10 and the rear. Never been bothered but its very rural here.
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yeah in Michigan we can have up to a 6 inch strip on the side windows in front, the rear windows can be any percentage that we want, and then on the windshield we can have any percentage with a four inch strip.