Eight teams with best 3year avg pts form two groups:the first from first group_name plays with the second from second group_name and vice versa and the winners qualify for the Copa Libertadores whilst the team with the less 3year avg pts relegates.The first two from each group_name qualify for the play offs.If a third team from any group_name has more points than a second team from any group_name then they play pre-qualify games. The winner is that periods champion. In the event of a points tie the following will apply: 1. Goal difference. 2. Most scored goals. 3. Matches between them. 4. Most away goals in the matches.