### Question
How does the law define pre-existing discharge?


### Answer
Under *33 U.S.C. § 1311*, **pre-existing discharge** is defined as:

> any discharge at the time of permit application under this subsection

#### Citation:
  - *33 U.S.C. § 1311*
  - Heading: **CHAPTER 26-WATER POLLUTION PREVENTION AND CONTROL > SUBCHAPTER III-STANDARDS AND ENFORCEMENT**

