---
kind: "section"
citation: "40 C.F.R. § 63.880"
title: "40"
number: "63.880"
heading: "Applicability."
url: "https://uscodex.org/cfr/40/63.880"
---

# §63.880. Applicability.

- (a) The requirements of this subpart apply to the owner or operator of each wool fiberglass manufacturing facility that is an area source or is located at a facility that is an area source.
- (b) The requirements of this subpart apply to emissions of chromium compounds, as measured according to the methods and procedures in this subpart, emitted from each new and existing gas-fired glass-melting furnace located at a wool fiberglass manufacturing facility that is an area source.
- (c) The provisions of [subpart A](/cfr/40/subpartA.md) of this part that apply and those that do not apply to this subpart are specified in Table 1 to this subpart.
- (d) Gas-fired glass-melting furnaces that are not subject to subpart NNN of this part are subject to this subpart.
- (e) Gas-fired glass-melting furnaces using electricity as a supplemental energy source are subject to this subpart.

## Notes

### Source

Source: 80 FR 45325, July 29, 2015, unless otherwise noted.

### Authority

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

### Source

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