i guess (Score 2, Informative)

i guess it would works like this eg. when the thief steals a car, they would change the plate, (if that plate is without RFID tag) the police would probably double check the car and its owner, if the replaced plate got its own RFID tag, the police would check the car description based on that RFID tag, if it is correct, then they can pass the block, otherwise, the police would invite them to police station.

btw, the police could just drive along the road and just check everybody RFID tag and their car description without asking them to stop ;) and if the tag doesn't match the car, then they can ask the driver to stop :) i guess something like that ;)