In the three-page document, Race Director Charlie Whiting listed precisely what information can and cannot be shared with drivers when they are on track, after the FIA answered key questions from GPUpdate.net last week.

As examples, drivers cannot be told where they are faster or slower than a rival, cannot receive a command to change a specific setting on their steering wheels or be given information on the level of fuel saving required.

Messages providing updates on tyre pressures or temperatures or warnings on brake wear or temperatures will also be prohibited, but these specific points are to be enforced from the following Japanese Grand Prix.

Information that can still be shared over the team radio and via pit boards includes lap or sector time detail, lap times of another driver, the time gap to another driver, tyre choice for the next stint, puncture/damage warnings, whether certain flags are being waved, the deployment of the Safety Car and the state of the track surface.