### Question
How does Subchapter Referred to in Other Sections define covered ozone nonattainment area?


### Answer
Under *42 U.S.C. § 7511b*, **covered ozone nonattainment area** is defined as:

> a Serious Area, as classified under section 7511 of this title as of October 27, 1998

#### Citation:
  - *42 U.S.C. § 7511b*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections > Part Referred to in Other Sections > Subpart Referred to in Other Sections**

