The Pro and the Elite2 are divided. After the start of the season, you don't need to shake it anymore.
For 21/2 it would be nice if there was a promotion and relegation based on performance and fair play.
And that reduced to the respective series. The FPI too! A -> A Pro (minimum 12 races), B -> B Pro (minimum 6 races) and C -> C Pro (minimum 6 races).
You drive all races of the Class A Elite 2, 18 races. The FPI from these 18 races and the placement at the end decide on promotion to the Pro.
If your FPI is <1 and you are in the top 12, then you move up. If your FPI is> 1 or you are outside the top 12, then you will not move up. Or your FPI is> 1, you are 6th in the championship, then you do not advance. So the first 12 with the best FPI would go up. Requirement FPI <1.
If you ride in the Pro, everyone who has an FPI> 1 descends. If that is only 4 people, the last 8 in the table will also be relegated, so that in total there will be 12 relegated people.
The same for B and C, but you have to have driven at least 6 races, in the Pro 12. Or 50%, ie 9 or 4.
Something like that, table position, race participation and FPI are included in the division Pro and Elite2.
Remaining in the PRO: FPI <1, among the first 30, at least 50% races (60% race distance minimum).
Relegation: FPI> 1, not within the first 30, not driven 50% of the races (or achieved less than 60% of the distance).
Ascent from the fast 2: Driven in the top 12 and FPI <1 in at least 50% (60% race distance) of the races.