What the sporting regulations say:
- Teams may use up to four drivers during a season, all of whom may score points in the championship.
- However, all drivers must possess an FIA Super Licence to compete in Formula One racing. To obtain that licence, they must be 18 years or older and meet strict performance standards.
- Drivers must have accumulated 40 points over a three-year period, with points allocation based on which other motorsport series they have participated in and the level of results they achieved.
- Drivers who qualify for a superlicence but are then unable to secure an F1 racing seat get a three-year grace period in which their points are valid.
- As well as securing enough points, drivers will have also have to have spent at least two years in junior single-seater categories, hold a valid road driver’s licence and pass a test on the Formula One sporting regulations. They must also have completed 300 kilometres of testing in a recent F1 car before they can appear at an event.
- On a race weekend, a team may make a driver change 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 up to two additional drivers, although each team is still limited to two cars.
- Any holder of a Super Licence 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.