A.R.S. § 49-542.04: Off-road vehicle and engine standards

A. The department may adopt rules for air pollution emission standards for off-road vehicles and engines marketed in the state beginning with the 1999 model year.

B. The standards may include the following categories:

1. Heavy-duty diesel vehicles rated at 175-750 horsepower.

2. Small utility and lawn and garden equipment engines rated at less than twenty-five horsepower.

3. Recreational vehicles rated at less than twenty-five horsepower.

4. Specialty engines and go-carts rated at greater than twenty-five horsepower.

5. Off-road motorcycles and all terrain vehicles.

C. In a county with a population of more than one million two hundred thousand persons, the department may adopt rules for air pollution emission standards for golf cart engines.