The U.S. Environmental Protection Agency (EPA) is approving revisions to the Missouri State Implementation Plan (SIP) related to Control of Nitrogen Oxide (NO<INF>X</INF>) Emissions From Large Stationary Internal Combustion Engines. The revisions reformat and revise reporting, recordkeeping, and compliance requirements; incorporate other State rules by reference; add definitions specific to the rule; revise unnecessarily restrictive or duplicative language; and make administrative wording changes. The revisions also add an exemption for certain spark-ignited internal combustion engines. The EPA's final approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).
Source
https://www.federalregister.gov/documents/2026/10/01/2026-20096/air-plan-approval-missouri-control-of-nox-emissions-from-large-stationary-internal-combustionCanonical document at the regulator. Always cite this URL — not the Vantage detail page — in compliance evidence.