Competitions Modus
The season was divided into 3 stages. In the first stage the 16 teams played a round-robin home-and-away round for a total of 30 matches each. In the second stage the 16 teams were divided into 2 groups. The 8 teams that ranked an odd number played in the group Liguilla A and the 8 teams that ranked an even number played in Liguilla B. Each team carried on their records from the first stage. Each group played another round-robin home-and-away round for 14 matches played by each team. The teams ranked first in each group at the end of the 14 matches advanced to the third stage. The two teams with the worst least points at the end of the second stage were relegated. In the third stage the championship was contested in a two-legged Play-off. The Play-off finalists qualified for the Copa Libertadores. The remaining international competition berths were determined by the season aggregate table.
Read more about this topic: 2009 Torneo Descentralizado
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“Passivity can be a provoking modus operandi;
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—Ogden Nash (19021971)