Used your link to answer my own question:

Under 49 U.S.C. § 30112(a), a person may not permanently import into the United States a motor vehicle manufactured after the date that an applicable Federal motor vehicle safety standard (FMVSS) takes effect unless the vehicle complies with the standard and is so certified by its original manufacturer. This prohibition applies to both new and used motor vehicles, but does not apply to motor vehicles that are at least 25 years old (based on the date that the vehicle was manufactured).

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NOW: 2017 C43 AMG, 2006 Wrangler Unlimited Rubicon, 1966 230SL, 1980 450SL (for sale!)
PAST: 2006 C230, 1997 E300D, 1994 E420, 1994 Neon Spt Cpe, 1984 300ZX, 1983 Celica GT, 1976 Electra Limited, 1984 Honda Nighthawk 650, 1979 Suzuki PE175, 1978 Suzuki DS100
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