### Question
How is the term fleet defined?


### Answer
The term **fleet** is defined in *42 U.S.C. § 16131* as the following:

> one or more diesel vehicles or mobile or stationary diesel engines

#### Citation:
  - *42 U.S.C. § 16131*
  - Heading: **CHAPTER 149-ENERGY POLICY, 2005 > SUBCHAPTER VII-VEHICLES AND FUELS > Part F-Diesel Emissions Reduction**

