24 teams and still only one non acc/b12/b10/sec team allowed.
By the rules, not exactly. Only 1
guaranteed. Up to... well... 20.
Currently, the top 24 include 3 non-majors (current 5 auto-bids, which could change, marked by *).
SEC (8) Georgia*, Alabama, Texas, Tennessee, Kentucky, Ole Miss, South Carolina, LSU
B10 (6) UCLA*, Indiana, USC, Iowa, Oregon, Ohio State
B12 (5) Utah*, Texas Tech, BYU, Houston, Arizona
ACC (2) Miami *, Wake Forest
Independent (1) Notre Dame*
P12 (1) Boise State
MWC (1) New Mexico
IINM, if the pool were drawn today, there would be 3 teams outside the majors (2 if you don't include Notre Dame).