NRS 484A.245: “Special mobile equipment” defined.

1. “Special mobile equipment” means every motor vehicle not designed or used primarily for the transportation of persons or property and only incidentally operated or moved upon a highway, including, but not limited to, scoopmobiles, forklifts, ditch-digging apparatus, well-boring apparatus and road construction and maintenance machinery such as asphalt graders, bituminous mixers, bucket loaders, tractors other than truck-tractors, leveling graders, finishing machines, motor graders, road rollers, scarifiers, earth-moving carryalls and scrapers, power shovels and draglines, and earth-moving equipment.

2. “Special mobile equipment” does not include house trailers, dump trucks, truck-mounted transit mixers, concrete pumpers, cranes or drill rigs with highway-rated tires or other vehicles designed for the transportation of persons or property to which machinery has been attached.

3. The Director may make the final determination as to whether a vehicle not specifically enumerated in subsection 1 or 2 falls within this definition.

4. The Department shall, by regulation, define “incidentally operated or moved upon a highway” for purposes of this section.