31) PRACTICE SESSIONS
31.1 Save where these Sporting Regulations require otherwise, pit lane and track discipline and safety measures will be the same for all practice sessions as for the race.
31.2 No driver may start in the race without taking part in at least one practice session.
31.3 During all practices there will be a green and a red light at the end of the pit lane. Cars may only leave the pit lane when the green light is on. Additionally, a blue flag and/or a flashing blue light will be shown in the pit exit to warn drivers leaving the pit lane if cars are approaching on the track.
31.4 Unless written permission has been given by the FIA to do otherwise, the circuit may only be used for purposes other than the Event after the last practice session on each day of practice and on the day of the race no less than one hour before the end of the pit lane is opened to allow cars to cover a reconnaissance lap.
31.5 The interval between the first and second free practice sessions, in addition to the interval between the third free practice session and the qualifying practice session, may never be less than two hours.
31.6 In the event of a driving infringement during any practice session the Stewards may drop the driver such number of grid positions as they consider appropriate. Unless it is completely clear that a driver committed a driving infringement any such incident will normally be investigated after the relevant session, any penalty imposed shall not be subject to appeal.
Where appropriate, regard will also be given to the provisions of Article 18.1.
31.7 Any driver taking part in any practice session who, in the opinion of the stewards, stops unnecessarily on the circuit or unnecessarily impedes another driver shall be subject to the penalties referred to in Article 31.6.
31.8 Should it become necessary to stop any practice session because the circuit is blocked by an accident or because weather or other conditions make it dangerous to continue, the clerk of the course will order red flags to be shown at all marshal posts and the abort lights to be shown at the Line.
When the signal is given to stop, all cars shall immediately reduce speed and proceed slowly back to the pit lane, and all cars abandoned on the track will be removed to a safe place.
At the end of each practice session no driver may cross the Line more than once.
31.9 The clerk of the course may interrupt practice as often and for as long as he thinks necessary to clear the track or to allow the recovery of a car. However, only during qualifying practice will the session be extended as a result.
Should one or more sessions be thus interrupted, no protest can be accepted as to the possible effects of the interruption on the qualification of drivers admitted to start.
32) FREE PRACTICE
32.1 Free practice sessions will take place :
a) The day after initial scrutineering from 10.00 to 11.30 (P1) and from 14.00 to 15.30 (P2).
b) The day before the race from 11.00 to 12.00 (P3).
33) QUALIFYING PRACTICE
33.1 The qualifying practice session will take place on the day before the race from 14.00 to 15.00.
The session will be run as follows :
a) From 14.00 to 14.20 (Q1) all cars will be permitted on the track and at the end of this period the slowest eight cars will be prohibited from taking any further part in the session.
Lap times achieved by the eighteen remaining cars will then be deleted.
b) From 14.27 to 14.42 (Q2) the eighteen remaining cars will be permitted on the track and at the end of this period the slowest eight cars will be prohibited from taking any further part in the session.
Lap times achieved by the ten remaining cars will then be deleted.
c) From 14.50 to 15.00 (Q3) the ten remaining cars will be permitted on the track.
The above procedure is based upon a Championship entry of 26 cars. If 24 cars are entered seven will be excluded after Q1 and Q2 and if 22 cars are entered only six cars will be excluded after Q1 and Q2.
33.2 Any driver whose car stops on the circuit during the qualifying session will not be permitted to take any further part in the session. Any car which stops on the circuit during the qualifying session, and which is returned to the pits before the end of the session, will be held in parc fermé until the end of the session.
Extracted from the FIA 2011 Formula One Sporting Regulations