I always put the front two down when I get pulled over, but yes, as said they ask you to roll it up so they can put the meter on it.
Funny thing is I have been pulled over twice(Now three times with the tint ticket) in the Cummins with that tint, one for a speeding ticket, the other for an illegal turn. They didn't say a word about the tint, but I did have both windows down even though it was kinda chilly out side, ha.