### Question
How is the "standard of performance" defined?


### Answer
The term **standard of performance** is defined in *42 U.S.C. § 7602* as follows -

> a requirement of continuous emission reduction, including any requirement relating to the operation or maintenance of a source to assure continuous emission reduction

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

