Nev. Rev. Stat. § 62A.300
"School bus" includes every motor vehicle owned by or under the control of a public or governmental agency or a private school and regularly operated for the transportation of children to or from school or a school activity or privately owned and regularly operated for compensation for the transportation of children to or from school or a school activity. The term does not include a passenger car operated under a contract to transport children to and from school, a common carrier or commercial vehicle under the jurisdiction of the Surface Transportation Board or the Nevada Transportation Authority when such a vehicle is operated in the regular conduct of its business in interstate or intrastate commerce within the State of Nevada.
NRS 62A.300