Uninvited team members visiting the stewards office during an investigation will see their team penalised, race director Michael Masi has confirmed.
In an email to the 10
Formula 1 teams seen by PA, Masi set out the FIA's new stance, a response to the crash at the British Grand Prix between Lewis Hamilton and Max Verstappen.
Shortly after the incident, Mercedes' Toto Wolff and Red Bull' Christian Horner visited the stewards while the investigation was ongoing.
Hamilton was given a 10-second penalty for his role in the crash.
Masi wrote that he wanted to "clarify the manner in which a competitor, their duly authorised representatives and/or drivers are permitted access to the stewards" during an investigation.
"Access to the stewards' office is strictly limited to the stewards, the stewards' secretary and the stewards operator," he continued.
"Admission is only permitted with the prior approval of the stewards or following a decision of the stewards to summons a competitor and/or driver.
"Any competitor or person associated with a competitor who does not comply with the requirements outlined above may be considered to have breached Article 12.2.1.i of the International Sporting Code. We trust that the above is clear."
The penalties that could be dished out if someone contravenes this new ruling include a reprimand, fine, points deduction or disqualification.