### Question
How is the "low emission and energy-efficient vehicle" defined?


### Answer
The term **low emission and energy-efficient vehicle** is defined in *23 U.S.C. § 166* as follows -

> a vehicle that—


(A) has been certified by the Administrator as meeting the Tier II emission level established in regulations prescribed by the Administrator under section 202(i) of the Clean Air Act (42 U.S.C. 7521(i)) for that make and model year vehicle

#### Citation:
  - *23 U.S.C. § 166*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS**

