### Question
How is the term affected unit defined?


### Answer
The term **affected unit** is defined in *42 U.S.C. § 7651a* as the following:

> a unit that is subject to emission reduction requirements or limitations under this subchapter

#### Citation:
  - *42 U.S.C. § 7651a*
  - Heading: **CHAPTER 83-ENERGY EXTENSION SERVICE > SUBCHAPTER IV&ndash;A-ACID DEPOSITION CONTROL**

