2011 sees the return of the 107% rule.
36.3 During Q1, any driver whose best qualifying lap exceeds 107% of the fastest time set during that session will not be allowed to take part in the race. Under exceptional circumstances however, which may include setting a suitable lap time in a free practice session, the stewards may permit the car to start the race. Should there be more than one driver accepted in this manner, the grid order will be determined by the stewards.
In either case, a competitor will not be able to appeal against the stewards decision.