### Question
What is the definition of standard of performance?


### Answer
The definition of **standard of performance** is as follows in *42 U.S.C. § 7602*:

> 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 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER III-GENERAL PROVISIONS**

