From the FHSAA.com football manual
4.7.2.3.2 State Semifinals (a) Dates and Times. See the football webpage at FHSAA.ORG.
(b)Bracketing. The Region 1 champion will play the Region 2 champion, and the Region 3 champion will play the Region 4
champion in the state semifinal games in each classification.
(c) Host Schools. One of the two competing schools shall be designated as the host school for each state semifinal game, and shall
determine the site of the game for which it serves as host. The host schools shall be designated as follows: teams with the
highest regular season wildcard point average will be designated “home” team.
LINK: http://www.fhsaa.org/sites/default/files/attachments/2010/09/16/node-178/1718_football_manual_0.pdf