Participation in the Mille Miglia is limited to cars, or cars of similar make and model, that participated in at least one of the original races between 1927 and 1957.
All cars must comply with FIVA and FIA regulations, which require that only cars with regular official certification may participate. Cars must be original. Replicas, including partial ones, cannot be entered.
According to the international regulations, cars are required to have a “FIVA Passport” (Fédération Internationale des Véhicules Anciens), issued by the home country federation (NSA). As is customary, the number of cars participating will be 375.
As requests for pre-registration are normally much higher, a strict criterion of rotation of models will be applied, with precedence given as follows:

• cars which took part in any of the original Mille Miglia
• cars with a significant competitive provenance.
• cars registered (even if it did not take part) in any of the original Mille Miglia. Documentary evidence is required.

Under no circumstances can any car built after 1957 participate. However, a certain number of cars built before 1927 may participate, provided models of these took part in the Mille Miglia up to 1930.