shorts: it has been a few years but last I checked for FL, shorts were allowed for varsity games, BUT you had to wear those long, striped socks with them. - making the officials look like poorly dressed tourists too.
Because of this, many opted to stick with standard Friday issue.
Conversely though, for MS & JV, many only wear shorts, but with regular ankle socks, as the state, to my knowledge, had no uniform standard or restriction for anything outside of Varsity.