### Question
How is the term new source defined?


### Answer
The term **new source** is defined in *42 U.S.C. § 7411* as the following:

> any stationary source, the construction or modification of which is commenced after the publication of regulations (or, if earlier, proposed regulations) prescribing a standard of performance under this section which will be applicable to such source

#### Citation:
  - *42 U.S.C. § 7411*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections > Amendments**

