As the sports technical demands have grown in recent years, so too has the importance of testing. With the FIA ever mindful of rising costs, teams are limited to 30,000 test kilometres during a calendar year. Young driver training and promotional events do not count towards this tally.
Testing can only take place at FIA-approved sites and, ahead of a session, teams must inform the governing body of their schedule so that an observer can be appointed if deemed necessary. From 2008, all cars must be fitted with the standardised, FIA-approved Electronic Control Unit during tests.