Complex sentence: On January 12,2012, CONCACAF announced that the 2012--13 tournament would be played under a different format than previous editions, where the Preliminary Round is eliminated and and all qualified teams enter the Group Stage.
Split into simpler sentences: On January 12,2012, CONCACAF announced that the 2012--13 tournament would be played under a different format than previous editions. The Preliminary Round is eliminated, and all qualified teams enter the Group Stage.