72 teams, divided into 4 groups of 18 teams each (Groups 1-4) on regional basis.
Each team plays against all the teams from its own group twice - home and away - for a total of 34 games each, over 34 game weeks.
3 points for a win, 1 point for a draw, 0 points for a loss.
1. points won; 2. points in head-to-head matches; 3. goal difference in hth matches; 4. goals scored in hth matches; 5. away goals in hth matches (only if two teams are tied); 6. total goal difference; 7. total goals scored; 8. fairplay ranking.
Relegation to the league:
4 teams from II Liga
Promotion from the league:
1 place of each group: promoted to II Liga
Relegation from the league:
12-15 place of each group: possible relegation to IV Liga *
16-18 place of each group: relegated to IV Liga
* - depends on the difference between the number of II Liga teams within the group's regional span relegated to each group (0-4) and the number of teams promoted from each group to II Liga (1) as follows:
if -1: no additional relegation from the group;
if 0: 15th placed team is also relegated to IV Liga;
if 1: 14th-15th placed teams are also relegated to IV Liga;
if 2: 13th-15th placed teams are also relegated to IV Liga;
if 3: 12th-15th placed teams are also relegated to IV Liga.
Promotion to the league:
16 teams from IV Liga
Promotion and relegation of II teams:
II teams cannot be promoted.
If any of them finishes on a promotion play-off spot, the next best team in the respective group's final table promotes instead.
II teams are to be relegated regardless of their league position if their first team gets relegated to III Liga.
In such case and if the II team is above the relegation zone, the best placed team in the group's relegation zone keeps its place in III Liga instead.