At the end of the season, three teams are promoted to Serie A and four teams are relegated to Serie C. The top two teams are automatically promoted. If the 3rd-placed team is 10 or more points ahead of the 4th-placed team, it is automatically promoted too, otherwise a playoff tournament determines the third team that will be ascending. In the 2013–14 season, anywhere between two and six teams within a "playoff margin" of 14 points from the 3rd-placed team will enter the playoff tournament. Under the new playoff format, up to three rounds may be required. The final two rounds are two-legged ties, while opening round matches (if required) are single legs hosted by the higher-ranked team. If a tie is drawn at the end of regular play (one or two matches, depending on the round), extra time is played. If the two teams are still tied after thirty minutes, the higher classified team advances.
In the relegation zone, the three last-placed teams (17th, 18th and 19th) are automatically demoted to Serie C. If the 15th-placed team is 5 or more points ahead of the 16th-placed team, then the 16th-placed team becomes the 4th and final team to be demoted, otherwise the conditions for a playoff more commonly called playout exist.
If the playout is necessary, the 15th and 16th-placed teams are paired in a two-legged series with home-field advantage in the 2nd leg going to the 15th-placed team. The team with the higher aggregate score remains in Serie B while the loser becomes the fourth team relegated to Serie C. If an aggregate tie exists at the end of regulation play of the 2nd leg, the 15th-placed team is saved, and the 16th-placed team is demoted.
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