I believe this to be true:
1. All schools must limit their total football roster to 85 per NCAA.
2. In the SEC, schools are limited to 25 players that can be enrolled each year, but they cannot go over the 85 limit.
3. Each school is allowed up to 3 back counts from the year before if they did not enroll 25 players from the year before. They number of back counts allowed depends on the number enrolled below 25.
4. The SEC gave Missouri and Texas A & M a one year exception on the 25 limit. They still are limited by the 85 total rule.
Please correct me if I am wrong on any point. Thanks!