---
kind: "section"
citation: "40 C.F.R. § 52.471"
title: "40"
number: "52.471"
heading: "Classification of regions."
url: "https://uscodex.org/cfr/40/52.471"
---

# §52.471. Classification of regions.


The District of Columbia plan was evaluated on the basis of the following classifications:


## Notes

### Amendments

[37 FR 10857, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 46 FR 61263, Dec. 16, 1981]

### Authority

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

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[37 FR 10857, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 46 FR 61263, Dec. 16, 1981]