The Iowa code talks about plates that "represent" original issued plates. I keep a copy of it in the glove box.
Antique Motor Vehicle/Limited Use
Iowa Code Section 321.58 through 321.62, 321.115, 321.122 and 321.124
Any motor vehicle 25 years old or older may be registered as an antique vehicle. The owner of a motor
vehicle which is registered as an antique may display authentic Iowa registration plates from the model
year of the motor vehicle, or representing the model year of the vehicle, furnished by the owner and
approved by the department, in lieu of a current and valid Iowa plate, provided the current Iowa plates
and registration issued to the vehicle are carried in the vehicle and are available for inspection to any
peace officer upon request
