---
kind: "section"
citation: "40 C.F.R. § 52.1821"
title: "40"
number: "52.1821"
heading: "Classification of regions."
url: "https://uscodex.org/cfr/40/52.1821"
---

# §52.1821. Classification of regions.


The North Dakota plan was evaluated on the basis of the following classifications:


## Notes

### Amendments

[37 FR 10885, May 31, 1972]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[37 FR 10885, May 31, 1972]