---
kind: "section"
citation: "40 C.F.R. § 71.23"
title: "40"
number: "71.23"
heading: "Applicability."
url: "https://uscodex.org/cfr/40/71.23"
---

# §71.23. Applicability.

- (a) **Sources covered.** The provisions of this subpart apply to an owner or operator of an existing source who is seeking a compliance extension under section 112(i)(5) of the Act and who, pursuant to [part 63](/cfr/40/part63.md), [subpart D](/cfr/40/subpartD.md), of this chapter, is required to file a permit application for the extension prior to the date a comprehensive title V permit program is approved for the State in which the existing source is located.
- (b) **Covered emissions.** All hazardous air pollutant emissions from the early reductions source shall be included in permit applications and [part 71](/cfr/40/part71.md) permits issued under this subpart.

## Notes

### Authority

Authority: 42 U.S.C. 7401, et seq.

### Source

Source: 59 FR 59924, Nov. 21, 1994, unless otherwise noted.