The winner of the SEC, ACC, Big 10, and Big 12 - get the first four spots, in ranked order. Then the next 5 - 12 get spots based on their rankings. The best "Group of 5" team gets in based on their ranking. If lower than 12 - they will be the 12 seed. Notre Dame can be no better than 5th, even if ranked #1.
Is that correct ?