Formula One has clarified the rules on radio communication between teams and drivers during World Championship races in the wake of incidents that have cost competitors points this season.

The clarification from the International Automobile Federation (FIA), the sport’s governing body, makes clear that a team can inform a driver of a problem with his car but must order him to enter the pits for a decision on what to do.

The technical directive, from Formula One race director Charlie Whiting ahead of Sunday’s Hungarian Grand Prix, defines more clearly what teams can tell drivers during a race.

The document, dated July 20 and seen by Reuters, says “any message of this sort must include an irreversible instruction to enter the pits to rectify the problem or to retire the car”.

The FIA has acted following some high-profile incidents relating to instructions from teams to drivers on the track.

At the British Grand Prix on July 10 Mercedes’ Nico Rosberg was found to be in breach of the rules restricting what information can be conveyed.

The German, nursing a potentially terminal gearbox problem, was hit with a 10-second time penalty that demoted him from second to third after the team gave him instructions on how to get around it.