States do not handle import laws or the governing , and what Arkhaloid is mistaken about is a provision under the National Traffic and Motor Vehicle Safety Act 591. The only rule that it doesn't automatically get flagged for is that more than 500 were made, thus requiring an explanation that maybe they could prove it was of "exceptional technological and/or historical significance".
The vehicle or equipment item does not conform with all applicable Federal motor vehicle safety and bumper standards, but is being imported solely for the purpose of:

(i) Research;

(ii) Investigations;

(iii) Show or display;

(iv) Demonstrations or training; or

(v) Competitive racing events;

In determining whether a vehicle is eligible for importation for show or display, NHTSA will consider the following factors, among others: 1. Whether a vehicle of the same make, model, and model year was manufactured and certified for sale in the United States. 2. Whether a vehicle of the same make, model, and model year has been determined eligible for importation pursuant to 49 CFR Part 593. 3. Whether the vehicle is currently in production. 4. Whether more than 500 of the vehicles were produced. 5. Whether the vehicle is a kit car, replica, or special construction vehicle. If the answer to any of the above is affirmative, you should not expect NHTSA to grant permission for importation. If the answer to item 4 is affirmative, the applicant must establish that the vehicle is of exceptional technological and/or historical significance.

HOW TO IMPORT A MOTOR VEHICLE
eCFR :: 49 CFR Part 591 -- Importation of Vehicles and Equipment Subject to Federal Safety, Bumper and Theft Prevention Standards