Only drivers listed in the entries as 'Green Light' are eligible to join the event, without exception. Even if the server is not full, you will still be unable to participate in the event if you are shown as red-light status.
Joining a race-server while listed as a 'Red Light' driver will cause you to be added to the server-ban list which will prevent you from joining Race2Play servers for future events. DO NOT join a race-server if you are shown as 'Red Light'.
Acquiring the race day password by any other means, or supplying the password to others, is considered a violation of the Race2Play Terms of Service and will result in penalty and possible suspension.