In 2010, Rule 4. Unauthorised Meetings, was relaxed for a trial period. The rule has now been further discussed for the 2011 season, and will be modified as follows.
Drivers may race in more than one open-wheeled Stock Car formula, providing the formula is recognised by the Oval Racing Council, and promoted by a member of the Oval Racing Council on one of its circuits.
Drivers must hold the appropriate licence for each open-wheeled formula they wish to race.
Drivers must use a different car for each open-wheeled formula they wish to race.
The effect of the modification of the rule is that a driver CAN race in BriSCA F2 Stock Cars AND Superstox but must do so in different cars. The onus is on the driver to ensure they do not race the same car in two different classes - the penalty for doing so will be a 12 month ORC ban.
Once a car has been entered and raced as a BriSCA F2 in 2011 it may not subsequently be converted / raced as a Superstox in 2011 [ and vice versa ] without express permission from the appropriate governing body.