The FIA has increased its checks on minimum starting tyre pressures, with new tests being made by Pirelli engineers every time new or used tyres are fitted to each F1 car.

With teams trying to optimise the rules with tyre pressures to gain any possible advantage, with many teams heating wheels to extreme temperatures before fitting wheels to lift tyre pressures when applied, the FIA has opted to clamp down on all tyre pressure checks.

As a result, for the Austrian Grand Prix a Pirelli delegate will check minimum starting tyre pressures - as confirmed by the tyre manufacturer prior to every race - before any new or used tyres are applied to cars in every practice session, qualifying session and the race.

Once the tyre pressure is confirmed and cleared no air may be released from the tyre but air can be added.

"FIA informs that with immediate effect during practice sessions, qualifying and the race the minimum starting tyre pressures, as set out in the Pirelli Preview for each event, will always be checked before the wheels are fitted to the car," an FIA statement read.

"These checks will only be carried out on new tyres or used tyres from a previous session, they must be done in the presence of, and be verified by, your designated Pirelli engineer.

"Once set, no air may be released from the tyres but air may be added, in addition, if a set of tyres is used more than once in any session there will be no requirement to reset the pressures to the minimum starting pressure.

"On the grid the starting pressures will be checked before the wheels are fitted to the car. These checks must be carried out in the presence of, and be verified by, a scrutineer, an FIA delegate or your designated Pirelli engineer. Once set no air may be released from the tyres but air may be added."

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