---
kind: "section"
citation: "40 C.F.R. § 423.10"
title: "40"
number: "423.10"
heading: "Applicability and severability."
url: "https://uscodex.org/cfr/40/423.10"
---

# §423.10. Applicability and severability.

- (a) **Applicability.** The provisions of this part apply to discharges resulting from the operation of a generating unit by an establishment whose generation of electricity is the predominant source of revenue or principal reason for operation, and whose generation of electricity results primarily from a process utilizing fossil-type fuel (coal, oil, or gas), fuel derived from fossil fuel (e.g., petroleum coke, synthesis gas), or nuclear fuel in conjunction with a thermal cycle employing the steam water system as the thermodynamic medium. This part applies to discharges associated with both the combustion turbine and steam turbine portions of a combined cycle generating unit.
- (b) **Severability.** The provisions of this part are separate and severable from one another. If any provision is stayed or determined to be invalid, the remaining provisions shall continue in effect.

## Notes

### Amendments

[89 FR 40293, May 9, 2024]

### Authority

Authority: 33 U.S.C. 1251 et seq.; 1311; 1314(b), (c), (e), (g), and (i)(A) and (B); 1316; 1317; 1318 and 1361.

### Source

Source: 47 FR 52304, Nov. 19, 1982, unless otherwise noted.

### Amendments

[89 FR 40293, May 9, 2024]