### Question
How is the term certified engine configuration defined?


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

> a new, rebuilt, or remanufactured engine configuration—


(A) that has been certified or verified by—


(i) the Administrator

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

