Complex sentence: Other schools do not have access to approved vehicles because the "Education Act" prohibits schools and school districts from owning their own vehicles, therefore they must use incorporated bodies to operate vehicles for extracurricular activities.
Split into simpler sentences: Other schools do not have access to approved vehicles because the "Education Act" prohibits schools and school districts from owning their own vehicles. To get around this they use incorporated bodies to operate vehicles for extracurricular activities.