40 CFR § 60.4390 - What are my reporting requirements if I operate an emergency combustion turbine or a research and development turbine?

---
identifier: "/us/cfr/t40/s60.4390"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.4390 - What are my reporting requirements if I operate an emergency combustion turbine or a research and development turbine?"
title_number: 40
title_name: "Protection of Environment"
section_number: "60.4390"
section_name: "What are my reporting requirements if I operate an emergency combustion turbine or a research and development turbine?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "60"
part_name: "STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "36 FR 24877, Dec. 23, 1971, unless otherwise noted."
cfr_part: "60"
---


# 60.4390 What are my reporting requirements if I operate an emergency combustion turbine or a research and development turbine?

(a) If you operate an emergency combustion turbine, you are exempt from the NO<sub>X</sub> limit and must submit an initial report to the Administrator stating your case.

(b) Combustion turbines engaged by manufacturers in research and development of equipment for both combustion turbine emission control techniques and combustion turbine efficiency improvements may be exempted from the NO<sub>X</sub> limit on a case-by-case basis as determined by the Administrator. You must petition for the exemption.