Sebastian Vettel (GER) Red Bull Racing and Guillaume Rocquelin (FRA) Red Bull Racing Race Engineer on the grid. Formula One World Championship, Rd13, Italian Grand Prix, Monza, Italy, Race Day, Sunday, 7 September 2014
The move follows recent media scrutiny about the amount of information being given to drivers by their race engineers, particularly in terms of how they can gain lap time.
F1 race director Charlie Whiting underlined the fact that Article 20.1 of the sporting regulations - which states that "the driver must drive the car alone and unaided" - must be respected at all times.
“No radio conversation from pit to driver may include any information that is related to the performance of the car or driver,” Whiting wrote.
“We should also remind you that data transmission from pit to car is specifically prohibited by Article 8.5.2 of the F1 Technical Regulations.”
The directive will be enforced from next week’s race in Singapore, round 14 of the 2014 FIA Formula One World Championship.