Boy am I getting old, and they keep on changing the rules .... when I was growing up there was only two states that had ONLY one license plate issued/vehicle. I knew this fact because I have always lived in Pennsylvania and was pulled over in another state for not having a front license plate. I believe now that alot of additional states now only issue a single license plate to help reduce costs. But looking at your list quickly I see Del, Georgia, and Florida listed .... I just drove through Del yesterday, most cars had both front and back plates. I have seen some Georgia and Florida tagged cars (on I95)recently and those cars had front plates also .... but I have recently noticed some Del cars w/ only a rear tag ... I thought they had lost their front tag. I like studying geography, so I like noticing which county they are from which to me seems odd to list .... if someone from "Philly" was in up-state Pa .... let's just say they are two completely different cultures ....
But front tags maybe coming back ... because of those "Photo-Radar Speed Traps" ... its hard to fight the speeding ticket w/ the proof being a pic of a car w/ a front license plate tag and your smiling face behind the steering wheel. It's hard to prove/convict w/ only a pic of the rear of a car w/ a license plate but no pic of the driver's face .... maybe I'll keep a "Gorilla Mask" in the truck ... no, a "Richard Nixon Mask" would be better!!!!
Harry