You're required to remove one of your drivers from your roster, the maximum you can have is four.
The information on your 3rd driver does not include nationality.
And a general reminder to all teams: Sign-ups are due on October 15th at 18:00 UTC. Rosters may also noto be edited after this point. Should it be necessary to ensure a team's participation though, exceptions can be made.
Teams who are not planning to participate should withdraw as soon as possible.