It is possible for new and returning drivers to sign up while the season is ongoing. They will do so on the lowest tier until it's full.
Car Changes
Car swaps permitted up-to (and including) round 3. The car you drive in
the 3rd round will be your final choice. All points awarded are
maintained.
Should you decide to change after this point, changing cars is permitted with a penalty of a points reset.
DNFs & DNS:
All drivers must complete 75% of the race winner's laps in order to score points. Otherwise it will be considered DNF.
Standings:
Drivers are ranked in the standings based on how many points they've scored over the whole season. If two or more drivers are tied on points, the higher place in the standings will be given to the holder of most wins, and in case of tie, second places and so on.