hi
basically similar rules to F1, so speeding in the pitlane, overtaking under yellow flag and the best one is the ability to punish constant crashers, set the program so that after three track calls by one driver and they get a drive through.
I think the number of times that a track call can be placed before a drive through occurs should be adjustable for individual drivers so as to cater for different skill levels.
Also ignore the drive through wich has to be taken within 3 laps and you get black flagged.