The FIA only measured the planks of four cars after the race, and found that those of Hamilton and Charles Leclerc were illegal, leading to the disqualifications of the two drivers.
The cars of Max Verstappen and Lando Norris were deemed legal, but despite the 50% failure rate on the bumpy COTA track, the FIA stuck with its usual protocols and opted not to sample any other cars further down the order.
