Bought my truck used in 2005 from a Columbus dealer and transferred the plates from my trade-in to the truck, which only had only had one license plate holder. When I looked it up, the dealer had purchased from out of state. Found out it was my responsibility to have a front plate holder installed, which I did.
If Ohio goes to one plate, expect the registration fees to increase, even though it will cost the state less. Hey, the BMV registrars are still making money on driver license lamination, even though they haven't laminated anything for some years.
I'm going to form my own state one day. Will probably make a killing.