How the fuck are you going to permanently secure a license plate to a car??? Epoxy that into the bumper… not to mention how are you supposed to turn in a plate… bring the entire bumper to DMV???
LOL
Ziptie, bolt, rivet, rope and a knot, big league chew… if it hold the plate to the bumper thats fine. Look up the law… there is a MIN/MAX height, and it need to be on the front most possible location on the car and cant be obstructed. IE cant put it on the dash… not the front most and is obstructed by a windshield even though it is clear.
Put the plate on how ever you can and drive to a police station, explain and they will/can/should/hopefully will give you a written piece of paper saying you put it on and that is what I would mail to the court when you plea NOT GUILTY. Give a nice formal letter with your signature and a date and what not explaining the deal.
I 2 sided taped a plate to the bumper. even tack welded the heads of 2 bolts on the plate. Took a picture and sent the pic and a explanation letter in… dismissed.