The FIA has moved to tweak its F1 Sporting Regulations regarding testing ahead of the new season.
Teams are permitted 'Promotional Event' runs - or as they are more commonly referred, filming days - up to 200km with the intent of the runs in order to create marketing and commercial material on track.
But it has become increasingly obvious that teams largely use their allotted time through these PE days to get extra on-track testing - primarily at a 'shakedown' ahead of official pre-season testing.
Ahead of the new season, an alteration to the regulations shows that the maximum total PE distance across a season has been increased from 200km to 400km.
The allocation was previously split into two different runs of 100km each which could both be completed on the same day, but the redrafting of the regulations permits just 200km running per day, meaning teams will have to split PE running into two days at least.