---
kind: "section"
citation: "40 C.F.R. § 63.5285"
title: "40"
number: "63.5285"
heading: "Am I subject to this subpart?"
url: "https://uscodex.org/cfr/40/63.5285"
---

# §63.5285. Am I subject to this subpart?

- (a) You are subject to this subpart if you own or operate a leather finishing operation that is a major source of hazardous air pollutants (HAP) emissions or that is located at, or is part of, a major source of HAP emissions. A leather finishing operation is defined in [§ 63.5460](/cfr/40/63.5460.md). In general, a leather finishing operation is a single process or group of processes used to adjust and improve the physical and aesthetic characteristics of the leather surface through multistage application of a coating comprised of dyes, pigments, film-forming materials, and performance modifiers dissolved or suspended in liquid carriers.
- (b) You are a major source of HAP emissions if you own or operate a plant site that emits or has the potential to emit any single HAP at a rate of 10 tons (9.07 megagrams) or more per year or any combination of HAP at a rate of 25 tons (22.68 megagrams) or more per year.
- (c) You are not subject to this subpart if your source finishes leather solely for the purpose of research and development.

## Notes

### Source

Source: 67 FR 9162, Feb. 27, 2002, unless otherwise noted.

### Authority

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

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.