If competitors or officials are placed in immediate physical danger by cars running on the track, and the clerk of the course deems circumstances are such that the track cannot be negotiated safely, even behind the safety car, the race will be suspended. Should it become necessary to suspend the race, the clerk of the course will order red flags to be shown at all marshal posts and the abort lights to be shown at the Line.
When the signal is given overtaking is forbidden, the pit exit will be closed and all cars must proceed slowly into the pit lane. The first car to arrive in the pit lane should proceed directly to the pit exit staying in the fast lane, all the other cars should form up in a line behind the first car.
Any cars unable to return to the pit lane as a result of the track being blocked will be brought back when the track is cleared and will be arranged in the order they occupied before the race was suspended.
Teams will be given a warning at least 10 minutes before race is resumed and three minutes to go cars must have their wheels fitted. At the two minutes signal, lapped cars can complete a lap and rejoin the pitlane.
Race will be resumed behind the safety car which will enter the pits after one lap unless conditions require it to stay longer or if all cars are not yet in line behind the safety car.
Overtaking is not allowed unless a driver is delayed while leaving the pit lane, forcing others to pass. Delayed driver may repass those cars to regain his original position.
If the race cannot be resumed, the results will be taken from the order at the end of the penultimate lap before the race was suspended.
No race may exceed four hours, regardless of race suspensions.
FIA F1 2017. sporting regulations can be downloaded here.
