Complex sentence: The system used is new for the 2006 season and on; the new feature being the additional two Division 1 series on the 3rd level, pushing down Division 2 and Division 3 a level on the ladder.
Split into simpler sentences: The system used is new for the 2006 season and on. The new feature being the additional two Division 1 series on the 3rd level, pushing down Division 2 and Division 3 a level on the ladder.