Complex sentence: In addition, for football participation, a school whose enrollment is at or below 99.5 students may choose to play either six-man football or 11-man Class A football; the school will be included in a Class A district for all other events.
Split into simpler sentences: In addition, for football participation, a school whose enrollment is at or below 99.5 students may choose to play either six-man football or 11-man Class A football. The school is included in a Class A district for all other events.