The FIA has relaxed Portimao's track limit rules after 125 violations and lap time deletions were triggered during Friday's opening day of running.
The governing body had implemented strict rules involving the Algarve track's Turn 1 and Turn 4, where drivers were sanctioned for putting all four wheels beyond the white line at the edge of the track.
However, the abundance of violations recorded in free practice, caused in part by Portimao's slippery track surface, and discussions held during Friday's drivers' briefing, have led FIA race director Michael Masi to publish on Saturday morning a revised event note.
The changes will allow drivers to run beyond the white line at Turns 1 and 4, with lap times remaining valid if a car remains in contact with the red and white kerb beyond the line.
"A lap time achieved during any practice session or the race by leaving the track and cutting behind the red and white kerb on the exit of turn one [or turn four] will result in that lap time being invalidated by the stewards," read Masi's revised note.
Regarding Turn 15, the event also stated that : "A driver will be judged to have left the track if no part of the car remains in contact with the track."
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Formula 1’s battle over fuel flow monitoring has spilled into the courtroom, with former supplier…
Barcelona has found a high-profile alternative to Formula 1 for 2027, with the Circuit de…
Christian Horner has revealed in his upcoming autobiography, Drive, that a “secret meeting” with Lewis…
He wasn't as flamboyant behind the wheel of a racing car as his countryman Ronnie…
Kimi Antonelli could be just one race away from an extraordinary Formula 1 milestone, but…
Christian Horner and Helmut Marko spent two decades operating as Red Bull’s formidable power couple,…