Update
Concessions are calculated in two windows:
Window 1: From the first event to the last event of the season.
Window 2: From the first event after the summer test ban to the last event before the summer test ban begins in the following season.
If a manufacturer changes rank during Window 2, the following permissions are granted:
Immediately
Test tyre allowance will be reduced/increased as per their rank – unless the manufacturer has already used more tyres than the number they have been reduced to
Private testing with or without contracted riders
Testing at any GP circuit or three manufacturer-nominated circuits for the remainder of the season
Wildcard allowance increased or reduced. This includes the cancellation of any wildcards that had already approved by the GPC for the period after the test ban.
Aero updates will be reduced/increased as per their rank (unless manufacturer has already used more aero specifications than the ones reduced to).
If changing down from Rank C to D: Engine allowance increased, free engine specification, and one more aero update allowed if a previous iteration is discarded
For the following season:
If changing up from Rank D to C - Engine allowance reduced, engine specification frozen UNLESS the manufacturer returns to Rank D by the end of the season.