### Question
How does Certain Industrial Equipment define IES?


### Answer
Under *42 U.S.C. § 6311*, **IES** is defined as:

> the Illuminating Engineering Society of North America

#### Citation:
  - *42 U.S.C. § 6311*
  - Heading: **CHAPTER 77-ENERGY CONSERVATION > SUBCHAPTER III-IMPROVING ENERGY EFFICIENCY > Part A&ndash;1-Certain Industrial Equipment**

