### Question
Can you define what affected unit means?


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

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

#### Citation:
  - *42 U.S.C. § 7651a*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER IV&ndash;A-ACID DEPOSITION CONTROL**

