A team of specially appointed scrutineers has the power
to check cars at any point during a Grand Prix weekend to ensure that
they fully comply with technical and safety regulations.
car is initially examined on the Thursday of a race meeting (Wednesday
at Monaco) and a car cannot take part in the event until it has passed
scrutineering. A car must be re-examined by scrutineers if any
significant changes are made to it by the team or if it is involved in
In addition to scrutineering, cars are also weighed
during the Grand Prix weekend to ensure that they comply with minimum
weight requirements (640kg). Cars taking part in Q1 and Q2 are called in
at random to be weighed, while all cars participating in Q3 are weighed
after the session. Classified finishers are weighed again after the
Any competitor failing to meet the minimum weight may lose
their qualifying times or be excluded from the race results unless this
is due to the accidental loss of part of the car.