8. Importing a vehicle that is at least 25 years old.
A motor vehicle that is at least 25 years old can be lawfully imported into the U.S. without regard to whether it complies with all applicable FMVSS.
....
11. Importing a right-hand drive vehicle.
In order to be lawfully manufactured or imported for sale in the U.S., a motor vehicle must comply with all applicable FMVSS issued by NHTSA. It is possible for a right-hand drive (RHD) vehicle to be manufactured in compliance with the FMVSS.
A motor vehicle that was not originally manufactured to comply with all applicable FMVSS, and/or was not so certified by its original manufacturer, in the form of a label permanently affixed to the vehicle, cannot be lawfully imported into the U.S. unless it is determined eligible for importation by NHTSA.