### Question
What is the definition of affected source?


### Answer
The definition of **affected source** is as follows in *42 U.S.C. § 7661*:

> given such term in subchapter IV–A of this chapter.

#### Citation:
  - *42 U.S.C. § 7661*
  - Heading: **CHAPTER 83-ENERGY EXTENSION SERVICE > SUBCHAPTER V-PERMITS**

