Any 13-0 team is in automatically. (So 13-0 Florida State is in over 12-1 Alabama.)
Any 12-1 conference champion is in over 12-1 non-conference champion
Any 2-loss team is automatically out.
12-1 Texas is always ahead of 12-1 Alabama due to head-to-head.
12-1 Alabama is ahead of 12-1 Oregon. (If the reverse is true, it only affects the scenario where Alabama, Michigan, Florida State, Oregon, and Texas all win.)
12-1 Georgia is in over any 1-loss non-conference champion.
12-1 Oregon is in over 12-1 Texas if Alabama loses because Texas's win over Alabama is then devalued, and Oregon is already ranked higher and would beat a better team (Washington) than Texas (OKST) next week.
12-1 Texas is in over 12-1 Oregon if Alabama wins because 12-1 Alabama is in over 12-1 Oregon, but 12-1 Texas is in over 12-1 Alabama and therefore also 12-1 Oregon.
11-1 Ohio State is in over 12-1 Florida State and 12-1 Washington. This may be controversial, but it leads to the last two assumptions:
Loser of Washington/Oregon is out (12-1 Washington or 11-2 Oregon)