Multifunction school activity bus

"Multifunction school activity bus" means a motor vehicle that was manufactured in compliance with the federal motor vehicle safety standards for school buses in effect on the date of manufacture other than the standards requiring the bus to display alternately flashing red lights and to be equipped with movable stop arms, and that is used to transport preprimary, primary, or secondary students on a school-related activity trip other than on routes to and from school. The term does not include a school bus, a school activity bus, a school-chartered bus, or a bus operated by a mass transit authority.