All schools that play in the sectional have voted, it is called the coaches vote, and it should be the coaches but some AD's vote instead. This is from the IHSAA winter Bulletin:
IX Entry List A. A school must certify all players on the sectional entry list but dress only 75 eligible players at each level of tourney. B. Member schools entering the football tournament series shall submit their entries to the IHSAA electronically at www.myihsaa.net. The entry is due no later than 4:00 p.m. Friday, October 11, 2019, without penalty. Member schools eligible to participate in the football tournament series may enter their team only after successful completion of the contest officials’ rating process. Failure to rate officials shall result in a $100 penalty to the school prior to their entry list being accepted.