New technical directives were issued on consecutive weekends at both the French and Styrian grands prix regarding, respectively, tyre pressures and pit stop equipment. The former was in response to the blow-outs suffered by both Lance Stroll and Max Verstappen during the Azerbaijan GP at Baku after a Pirelli investigation found that the running conditions of the tyres were in some cases lower than Pirelli had calculated.
There is significant performance to be gained by running below the specified minimum pressures. Henceforth the FIA could request any tyre used in the race, after being heated to the tyre blanket temperature allowed pre-race, would have to show a pressure no lower than that specified by Pirelli.
Delaying the release of the car from the garage after tyre blankets have been removed is now prohibited. This is all just a stop-gap until 2022 when the FIA will provide the teams with standard tyre pressure sensors linked up to race control. At the moment the teams use their own sensors.