It was set to be introduced in the 2020 season, but it was postponed due to the COVID-19 pandemic.
The top two teams qualify for the Toppserien play-offs.
The teams from 3rd to 10th position take part in the First Division play-offs.
They carry over their points and goal difference from the regular season.
The winners qualify for the promotion play-offs, where they will face the 6th placed team in the Toppserien relegation round.