Yes, it must be mounted on the rear of the motorcycle in plain view.
Not legally.
Yes, there is a law in NC requiring a license plate on the motorcycle. Without this a person can receive a ticket and pay a fine.
No you can't.
Illinois
The Illinois license plate is two tone gray with the name 'Illinois' in the top left corner and the motto, 'Land of Lincoln' in the upper right corner. See this plate on the link below.
12fg
That depends on whether or not you have moved to Illinois. If you have then the answer is Yes.
It is the designed lettering for the Route 66 license plate.
Must be visibly mounted at rear of motorcycle (so on a plate off of license plate is a pretty good spot).
License plates are needed for car identification. When a license plate expires, the plate must be returned to the local department of motor vehicles.
I believe it was 12FG
for a motorcycle is cost 44$ Canadian