I've found this article on Renault blog but the guy who posted it didn't insert url of source.
THE FERRARI F2007 IS ILLEGAL?!
With the new season, comes new allegations of the Ferrari racecar being outside the rules from other teams. This time there are claims, possibly from McLaren, that the floor of the F2007 is a moveable aerodynamic device.
With the new season, comes new allegations of the Ferrari racecar being outside the rules from other teams. This time there are claims the floor of the F2007 is a moveable aerodynamic device. Apparently the floor of the Ferrari has been designed to drop down, bringing the car closer to the racing surface and thus reducing the air moving underneath the car. This would in turn increase the speed of the car in a straight line. Further to this, less wing would be required on the rest of the car, while still maintaining a high level of speed.
Of course this floor would be illegal, as it classifies as a moveable aerodynamic device. There has been no formal declaration of speculation from the FIA with regards to this issue. However, FIA stewards were seen at the Australian Grand Prix to be paying special attention to the floors of cars and specifically to the Ferrari's.
Speculation of the Ferrari being illegal may have come from McLaren's Ron Dennis as he was rather vocal about many cars being illegal when he spoke to American television network SPEED:"We will see how things are in two or three races. There is a whole range of things that come to light in the first race and you go and you say what is legal, and what is not legal. Most teams are given that current race to enjoy the benefit of the doubt. I think there will be a rationalization of some aspects of some cars that would close the gap if no one did anything.
You look at people’s cars, you are not always of the opinion that rule interpretation has been strictly adhered to, and you get in to, ‘Hold on a second, what are we allowed to do and what are we not allowed to do?’ and that always takes place at the first event. So it takes a race or two to know what is or isn’t permitted."
A Ferrari spokesperson responded to the criticism, stating this to SPEED:
"It’s part of the game any time Ferrari is quickest. It’s not the first time that there have been questions about legality. If someone has a complaint, there is always the FIA."
Now first of all, it must be stated that if the Ferrari is indeed illegal, which it may be, action should be taken against the Scuderia. However, this may simply be posturing from the other Formula 1 teams as they feel threatened by Ferrari's very impressive pace in pre-season testing and the race in Australia. As with everything in Formula 1, only time will tell.