StacksVerified U.S. regulatory reference

40 CFR §63.6580

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Subpart ZZZZ establishes national emission limitations and operating limitations for hazardous air pollutants (HAP) emitted from stationary reciprocating internal combustion engines (RICE) located at major and area sources of HAP emissions. This subpart also establishes requirements to demonstrate initial and continuous compliance with the emission limitations and operating limitations.