---
kind: "section"
citation: "40 C.F.R. § 421.81"
title: "40"
number: "421.81"
heading: "Specialized definitions."
url: "https://uscodex.org/cfr/40/421.81"
---

# §421.81. Specialized definitions.


For the purpose of this subpart:

- (a) Except as provided below, the general definitions, abbreviations, and methods of analysis set forth in [40 CFR part 401](/cfr/40/part401.md) shall apply to this subpart.
- (b) The term product shall mean zinc metal.

## Notes

### Source

Source: 49 FR 8808, Mar. 8, 1984, unless otherwise noted.

### Authority

Authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4.

### Source

Source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.