Team changes can be made at all times during the competition, except for a two-hour period after the scheduled start time of each race (i.e. except during a race).
Changes are unlimited right up until the scheduled start of the Main Championship - the Chinese Grand Prix, starting at 08:00 BST on Sunday, 14 April.
Once the Main Championship begins, team managers are then left with a quota of 25 changes for the remainder of the season. This may comprise any combination of driver and constructor changes.
There is no additional limit to the number of changes between races, meaning that you can make as many changes as necessary before each race so long as you remain within your overall transfer quota. This gives you plenty of room for tactical changes should your team need a significant overhaul at any time during the season.
However, you must still ensure that your selections remain within the allocated $100 million budget.
To make changes, click on the CHANGE SELECTION button on your team screen and follow the on-screen instructions.
All team changes take place with immediate effect. Changes made in preparation for a race can be cancelled by clicking the CANCEL CHANGES button on the team screen; your transfer quota will also be reimbursed accordingly. Changes made prior to the previous race cannot be reversed.
Qualification can act as a useful guide for the race, with points available for drivers finishing higher than their grid position.
Please note that the time of the scheduled start of a race will differ from the time that the actual race starts, so don't leave things to chance by making changes at the last minute!