---
kind: "section"
citation: "40 C.F.R. § 52.781"
title: "40"
number: "52.781"
heading: "Rules and regulations."
url: "https://uscodex.org/cfr/40/52.781"
---

# §52.781. Rules and regulations.

- (a) [Reserved]
- (b) A part of the second sentence in [section 3](/cfr/40/3.md), APC-17, which states “Where there is a violation or potential violation of ambient air quality standards, existing emission sources or any existing air pollution control equipment shall comply with th
- (c) -(d) [Reserved]
- (e) [Section 2(d)](/cfr/40/2.md?p=d) of APC-20, Fugitive Dust Emissions, is disapproved because it is unenforceable within the terms of the regulation.
- (f) Subsections 3(b)(3) and 3(b)(5) of APC-2 (May 18, 1977) are disapproved because they are unenforceable within the terms of the regulation.
- (g) **Disapproval.** EPA is disapproving 326 IAC 25-2-1, 326 IAC 25-2-3 and 326 IAC 25-2-4 as revisions to the Indiana SIP.
- (h) **Disapproval.** EPA is disapproving the December 10, 2009 submittal of 326 IAC 7-4-14 as a revision to the Indiana SIP.

## Notes

### Amendments

[37 FR 10863, May 31, 1972, as amended at 37 FR 15084, July 27, 1972; 38 FR 12698, May 14, 1973; 40 FR 50033, Oct. 28, 1975; 43 FR 26722, June 22, 1978; 75 FR 72965, Nov. 29, 2010; 78 FR 78725, Dec. 27, 2013]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[37 FR 10863, May 31, 1972, as amended at 37 FR 15084, July 27, 1972; 38 FR 12698, May 14, 1973; 40 FR 50033, Oct. 28, 1975; 43 FR 26722, June 22, 1978; 75 FR 72965, Nov. 29, 2010; 78 FR 78725, Dec. 27, 2013]