All 12 teams enter the competition at this stage. A random draw determines which teams face each other in each of the four rounds. No team can meet each other twice in the group stage. The top 8 teams go into a seeded draw for the quarter-finals while the bottom 3 teams will enter a Relegation Playoff. If teams are level on points and a place in the quarter-final is at stake, a Playoff will be conducted to determine who goes through.
The 3 bottom placed teams the league phase will enter the relegation play-offs. The 10th and 11th placed teams from the league phase will face each other in the Relegation Semi-Final, with the winner maintaining their senior status for 2020. The loser will face the 12th placed team with the loser being relegated to the 2020 Intermediate Championship.