40 CFR § 63.6080 - What is the purpose of subpart YYYY?

---
identifier: "/us/cfr/t40/s63.6080"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.6080 - What is the purpose of subpart YYYY?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.6080"
section_name: "What is the purpose of subpart YYYY?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "63"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "57 FR 61992, Dec. 29, 1992, unless otherwise noted."
cfr_part: "63"
---


# 63.6080 What is the purpose of subpart YYYY?

Subpart YYYY establishes national emission limitations and operating limitations for hazardous air pollutants (HAP) emissions from stationary combustion turbines located at major sources of HAP emissions, and requirements to demonstrate initial and continuous compliance with the emission and operating limitations.