Teams may use up to four drivers during a season, all of
whom may score points in the championship. A driver change may be made
with the permission of the stewards any time before the start of
qualifying. The new driver must use the engine and tyres allocated to
the original driver.
On top of this, in each of Friday's two
practice sessions teams may run additional drivers, though each team is
still limited to two cars. Any holder of a Super License may run as an
additional driver, but stewards must be informed of a team's plans
before the end of initial scrutineering on the Thursday prior to
practice.
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