### Question
Can you define what applicable implementation plan means?


### Answer
**Applicable implementation plan** is defined as the following in *42 U.S.C. § 7602*:

> the portion (or portions) of the implementation plan, or most recent revision thereof, which has been approved under section 7410 of this title, or promulgated under section 7410(c) of this title, or promulgated or approved pursuant to regulations promulgated under section 7601(d) of this title and which implements the relevant requirements of this chapter

#### Citation:
  - *42 U.S.C. § 7602*
  - Heading: **CHAPTER 83-ENERGY EXTENSION SERVICE > SUBCHAPTER III-GENERAL PROVISIONS**

