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Ja & Jb Vintage Cars (Pre-1931)
group is intended to represent the early racing and
sports car development period of significant excellence
in design and workmanship known as the "vintage"
group is split into the two subclassifications, Ja and
Ja: Vehicles eligible for this group will be racing and
sports cars with a competition history established prior
to 31 December, 1930. Consideration will also be given to
individual sports cars that do not have an established
competition history but are of a type that appeared in
competition prior to the end of 1930.
Jb: One-off "special" type vehicles constructed at any
time using major components (ie, engine, chassis,
transmission, axles and suspension) manufactured prior to
the end of 1930. Such vehicles must be similar in
detailed specification and appearance to vehicles, which
actually appeared in competition prior to the end of
1930. Vehicles which precisely replicate a genuine
original historic racing car will however be eligible
only within the provisions of the regulations relating to
"recreations" (refer section 1.7 of the 5th Category
Preamble in the CAMS manual).