Are the teams allowed to change driver during the season?
Yes, each team may change the driver of its first car once in the season. For the second car, a maximum of three drivers may take turns, without restriction, during any one season. This excludes cases of exceptional circumstances, which are considered separately. Notification of a change of driver must be made before 16:00 on the Thursday (Wednesday for Monaco). After that deadline, a driver change may only take place with the consent of the stewards. 20.