The organization encourages the restoration, preservation, and racing of historically significant automobiles that are configured as closely as possible to their original design and construction.
Examples: World Championship for Makes sports cars as raced after 1970 on slicks.
Examples: GTP/Group C, ALMS, PSCR, WSC, Grand Am, and WeatherTech Championship prototype cars as raced from 1981 to five years before the current date.
Examples: Select GT sports cars and sedans raced between 1973 and 5 years prior to today's date or when homlogation has expired.
These are Production-based cars such as the IMSA Michelin Pilot Challenge or any other stock / prepared racing series once their homologation has expired.
Early IMSA GTO and GTU small bore cars will be accepted on an individual basis.
Examples: On October 25–27, 2013, SVRA held the inaugural United States Vintage Racing National Championship at the Circuit of the Americas near Austin, Texas.