I did not get any tickets for the front license plate both times.

It is my understanding that rears are whatever you like .

Both times, they tried to make the situation better by saying * I could ticket you for all 4 windows, but I'm only going to ticket you for the drivers front*.
By law, I think it's fronts ONLY but I'm not sure whether is per window or not. I'm going to dig that up just for reference....