Thanks for the link. This is what it said on that webpage:
"For CBP clearance you will need the shipper's or carrier's original bill of lading, the bill of sale, foreign registration, and any other documents covering the vehicle. You will also be required to complete EPA form 3520-1 and DOT form HS-7, declaring the emissions and safety provisions under which the vehicle is being imported. Vehicles that meet all U.S. emission requirements will bear manufacturer's label on the engine compartment in English, attesting to that fact. For vehicles that lack such a label, the CBP inspector at the port of entry may require proof of eligibility to import under the EPA exemptions or exclusions specified on form 3520-1.
Vehicles that do not meet all U.S. emission requirements, unless eligible for exemption or exclusion must be imported through an independent commercial importer (ICI). EPA will not allow the vehicles' release to the vehicle owner until ICI work is complete. The ICI will perform any EPA-required modifications and be responsible for assuring that all EPA requirements have been met. Some vehicles cannot be successfully imported or modified by an ICI, however, and in general, ICI fees are very high."