In some states, like MA, it is more of a way raise money as far as I can see. Taxes. MA is great at taxing everything. The required plates on emergency vehicles is most likely proof of said registration and more importantly I would guess an indication of insurance. read more
We have"Turn In An Arsonist" and"1-800-GRAB-DUI" plates on our trucks. I am not aware of a requirement to display a license plate, but I do believe that a plate must be issued to each vehicle. read more