changing the camber would be "active suspension", not allowed.
Moving the whole steering rack in and out will allow the change of toe in - toe out without being considered "active suspension".
On the straight line speed toe out or toe in will scrub the tires, with neutral toe the wheels will run straight no scrubbing thus more speed, then in the corner you put the toe back in for more grip.
changing the camber would be "active suspension", not allowed.
Moving the whole steering rack in and out will allow the change of toe in - toe out without being considered "active suspension".
On the straight line speed toe out or toe in will scrub the tires, with neutral toe the wheels will run straight no scrubbing thus more speed, then in the corner you put the toe back in for more grip.