As of this weekend’s European Grand Prix, lapped cars will be shown the blue flags when the leaders are 1.2 seconds behind.
As of the start of this year's championship, backmarkers were only given an official blue flag when the leaders were a second behind.
But with drivers complaining that they are struggling to get to within that second, making it difficult to lap cars, FIA race director Charlie Whiting has tweaked the timing to 1.2s.
He told the teams: "When the faster car is within 1.2s of the car about to be lapped blue flags will be shown to the slower car (in addition to blue light panels, blue cockpit lights and a message on the timing monitors) and the driver must allow the following driver to overtake at the first available opportunity."
Experience the full coverage of the FIA Formula One season throughout 2017 on FOX Sports Play, where you can watch LIVE races from angles, unlike any other, highlights, interviews, behind the scenes and much more. Don’t miss it!