### Question
How is the "nonroad engine" defined?


### Answer
The term **nonroad engine** is defined in *42 U.S.C. § 7550* as follows -

> an internal combustion engine (including the fuel system) that is not used in a motor vehicle or a vehicle used solely for competition, or that is not subject to standards promulgated under section 7411 of this title or section 7521 of this title

#### Citation:
  - *42 U.S.C. § 7550*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER II-EMISSION STANDARDS FOR MOVING SOURCES > Part A-Motor Vehicle Emission and Fuel Standards**

