The FIA has issued a further clampdown on radio communication ahead of the Hungarian Grand Prix, with drivers now forced to pit if they are informed of a serious problem.
Mercedes' controversial message to Nico Rosberg during the closing stages of the British Grand Prix enabled him to retain second spot, ahead of Max Verstappen.
Stewards later deemed that Mercedes had breached the regulations and handed him a 10-second penalty, demoting him to third position.
Prior to the Hungarian Grand Prix, a further directive was issued, meaning drivers will have to enter the pit lane in order to be provided with advice on how to solve potential problems.
The FIA also confirmed that electronic sensors will be used to enforce track limits at Turns 4 and 11 at the resurfaced and renovated Hungaroring.
While the track layout has not been altered, kerbs have been renewed, leading Race Director Charlie Whiting to issue a warning.
"As the run-off areas behind the kerbs have been set at the same height as the kerbs themselves, the required deterrent is therefore not present," read Whiting's notes.
"With this in mind we have installed loops 1.6 metres from the track edge which will alert us when a car has all four wheels off the track in these two locations."