The FIA has released a list of the messages that will and will not be allowed to be sent to drivers as part of its clampdown on team radio.

Last week Charlie Whiting issued a directive to the teams informing them that the FIA would be banning messages aimed at improving a driver's performance by rigorously enforcing Article 20.1 of the sporting regulations which states: "The driver must drive the car alone and unaided."

Following comments from the likes of Toto Wolff that the FIA's stance was a "controversial" one, the governing body has now issued a more definitive list of which messages will be allowed and which ones will be considered a breach of regulations.

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Permitted messages

  • Acknowledgement that a driver message has been heard.
  • Lap or sector time detail.
  • Lap time detail of a competitor.
  • Gaps to a competitor during a practice session or race.
  • "Push hard", "push now", "you will be racing xx" or similar.
  • Helping with warning of traffic during a practice session or race.
  • Giving the gaps between cars in qualifying so as to better position the car for a clear lap.
  • Puncture warning.
  • Tyre choice at the next pit stop.
  • Number of laps a competitor has done on a set of tyres during a race.
  • Tyre specification of a competitor.
  • Indication of a potential problem with a competitor's car during a race.
  • Information concerning a competitors likely race strategy.
  • Yellow flags, blue flags, Safety Car deployment or other cautions.

Prohibited messages:

  • Sector time detail of a competitor and where a competitor is faster or slower.
  • Adjustment of power unit settings.
  • Adjustment of power unit setting to de-rate the systems.
  • Adjustment of gearbox settings.
  • Learning of gears of the gearbox (will only be enforced from the Japanese Grand Prix onwards).
  • Balancing the SOC [state-of-charge of batteries] or adjusting for performance.
  • Information on fuel flow settings (except if requested to do so by race control).
  • Information on level of fuel saving needed.
  • Information on tyre pressures or temperatures (will only be enforced from the Japanese Grand Prix onwards).
  • Information on differential settings.
  • Start maps related to clutch position, for race start and pit stops.
  • Information on clutch maps or settings, e.g. bite point.
  • Burn-outs prior to race starts.
  • Information on brake balance or BBW (brake-by-wire) settings.
  • Warning on brake wear or temperatures (will only be enforced from the Japanese Grand Prix onwards).
  • Selection of driver default settings (other than in the case of a clearly identified problem with the car).
  • Answering a direct question from a driver, e.g. "Am I using the right torque map"?
  • Any message that appears to be coded.