ART. 24 of the
2012 Sporting Regulations:
24) SCRUTINEERING
24.1 Between 10.00 and 16.00 three days before the race (four days in Monaco) initial scrutineering
of all cars will take place in the garage assigned to each competitor.
24.2 Unless a waiver is granted by the stewards, competitors who do not keep to these time limits
will not be allowed to take part in the Event.
24.3 No car may take part in the Event until it has been passed by the scrutineers.
24.4 The scrutineers may :
a) Check the eligibility of a car or of a competitor at any time during an Event.
b) Require a car to be dismantled by the competitor to make sure that the conditions of
eligibility or conformity are fully satisfied.
c) Require a competitor to pay the reasonable expenses which exercise of the powers
mentioned in this Article may entail.
d) Require a competitor to supply them with such parts or samples as they may deem
necessary.
24.5 Any car which, after being passed by the scrutineers, is dismantled or modified in a way which
might affect its safety or call into question its eligibility, or which is involved in an accident with
similar consequences, must be re‐presented for scrutineering approval.
Any such re‐scrutineering may only take place with the consent of the stewards (following a
written request from a competitor) and will be carried out the next morning.
24.6 The race director or the clerk of the course may require that any car involved in an accident be
stopped and checked.
24.7 Checks and scrutineering shall be carried out by duly appointed officials who shall also be
responsible for the operation of the parc fermé and who alone are authorised to give
instructions to the competitors.
24.8 The stewards will publish the findings of the scrutineers each time cars are checked during the
Event. These results will not include any specific figure except when a car is found to be in
breach of the Technical Regulations.
As I read this your car is checked on Thursday and when you put on parts on Friday or Saturday morning an additional scrutineering can take place where the scrutineers can force you to change your car.
And as it often changes what is deemed legal or illegal you're free go to the limits of regulation.
Plus I don't see most of the testing advices and sensors being illegal.
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