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


### Answer
The term **new source** is defined in *42 U.S.C. § 7412* as follows -

> a stationary source the construction or reconstruction of which is commenced after the Administrator first proposes regulations under this section establishing an emission standard applicable to such source

#### Citation:
  - *42 U.S.C. § 7412*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections > Amendments**

