First, the 13 committee members each choose 30 teams; the ones chosen by at least 3 members are eligible to be ranked.
Next, each member chooses 6 schools; the 6 chosen by the most members are then ranked 1-6 by each member, and the three with the best average ranking are the #1-3 ranked teams.
They then choose 6 schools again; the top 3 are added to the 3 left over from the first round, and these six are ranked 1-6 by each member, with the three with the best average ranking being the #4-6 ranked teams.
This keeps going, but who cares, except maybe for determining (assuming Georgia beats LSU) which of LSU and Tennessee end up in the Orange, and whether the other or, maybe, USC gets into the Cotton.

Note that Michigan's AD cannot be part of any vote where Michigan is one of the teams involved - including, for example, the vote to rank the top three teams.

I don't think that's what a lot of us are looking at right now, because I think you could easily be seeing an NINE FOR TWO scenario at this point...

Utah and K State as conference champs.
Ohio State as the highest ranked team not to lose today yet.
Clemson could enter the concept with a win tonight.
USC is almost certainly out, but the TCU loss complicates it.
And then Alabama and Tennessee waiting in the wings (if you're going to take Alabama, then why not consider Tennessee because of the victory HTH?)...
And Penn State is ranked in there as well.

Even if Georgia and Michigan win, there are now NINE TEAMS which can make somewhat of a case for inclusion, and all (except maybe Clemson (and Ohio State if Michigan rolls Purdue)) have serious blemishes.

Mike