108 teams, distributed into 9 groups of 12 teams each on regional basis.
Each team plays the others from its own group twice - home and away - for a total of 22 games each, over 22 game weeks.
3 points for a win, 1 point for a draw, 0 points for a loss.
1. points won; 2. total goal difference; 3. total goals scored; 4. points in head-to-head matches; 5. goal difference in hth matches; 6. goals scored in hth matches; 7. fewer away goals conceded *; 8. home goals scored *; 9. fewer home goals conceded *; 10. play-off *; 11. draw.
* - used only for deciding promotion and relegation.
Relegation to the league:
9 teams from Kakkonen
Promotion from the league:
1 place of each group: promoted to Kakkonen
Relegation from the league:
11-12 place of each group: relegated to Nelonen
Promotion to the league:
18 teams from Nelonen