It violates TD003, issued after Baku 2021 to make sure that teams handle tyres according to the guidelines provided by Pirelli.
Emphasis mine
A Technical Directive to all teams will become effective from this weekend’s French Grand Prix, with safety on the mind of the FIA after the tyre failures experienced by two teams in Azerbaijan. Pirelli released their findings on Tuesday into the failures of Aston Martin’s Lance Stroll and Red Bull’s Max Verstappen in Baku, with the issues stemming from the way the tyres were being operated being the possible cause of the failures.Following this, teams will now face more stringent conditions under which they must operate their tyres in relation to pressures and temperatures, in a bid to ensure there will be no further failures.
![[FIA] Car 16 (Leclerc) summoned for changing tyre pressure in pit stop position.](https://lemmy.world/pictrs/image/bce755b4-6325-4f7c-abc9-cd0df2bdc376.jpeg){kind=link}
Was caught on TV - what’s wrong with doing that though?
It violates TD003, issued after Baku 2021 to make sure that teams handle tyres according to the guidelines provided by Pirelli.
Emphasis mine
Source: https://racingnews365.com/new-tyre-rules-in-place-for-france-after-azerbaijan-failures