Key points
- 1Environmental Protection Agency published the final action “Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act.” Environmental Protection Agency published the proposed action “Air Plan Approvals; Illinois; Regional Haze Plan for the Second Implementation Period; Interstate Transport of Air Pollution for the 2012 PM2.5 and 2015 Ozone NAAQS.” The legal effect of those events depends on their distinct posture, not their shared appearance in a monthly feed.[1][2]
- 2EPA’s greenhouse-gas rescission and its Illinois regional-haze and interstate-transport action operate at different levels of the Clean Air Act structure. A national policy change does not eliminate the need to track state-plan obligations, conventional pollutants, effective dates, and review proceedings separately.[1][2]
- 3The response should begin with a verifiable record of the authority that actually governs the matter, the operational facts, the accountable decision maker, and any event that requires the analysis to be refreshed. The background authorities collected here are context, not a conclusion that each governs every monthly development.[3][4]
February 2026: the record in view
The first in-window anchor is “Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act,” issued by Environmental Protection Agency. The second is “Air Plan Approvals; Illinois; Regional Haze Plan for the Second Implementation Period; Interstate Transport of Air Pollution for the 2012 PM2.5 and 2015 Ozone NAAQS,” issued by Environmental Protection Agency. Read together, they show the range of instruments, enforcement postures, and—where present—judicial authority that can shape this practice area during a single month.[1][2]
Neither a publication title nor an agency summary should be asked to carry more weight than its posture permits. A proposed action is not a final rule; a charging document states allegations; a settlement resolves a matter on negotiated terms; and a notice may initiate, explain, or complete only the procedure it identifies.[1][2]
The legal significance
EPA’s greenhouse-gas rescission and its Illinois regional-haze and interstate-transport action operate at different levels of the Clean Air Act structure. A national policy change does not eliminate the need to track state-plan obligations, conventional pollutants, effective dates, and review proceedings separately.[1][2]
EPA issued a final rule rescinding the 2009 greenhouse-gas endangerment and contribution findings and repealing vehicle greenhouse-gas standards based on the agency’s current statutory interpretation, a nationwide final action with immediate regulatory significance and substantial litigation exposure. The agency separately proposed to approve Illinois regional-haze measures and portions of the state’s PM2.5 and ozone infrastructure SIP; those approvals remain contingent on completion of notice and comment.[1][2]
A Federal Register action is best understood by locating it within the Clean Air Act architecture: the applicable standard, the state or local implementation mechanism, the source category, and the procedural step actually taken. The selected statutory, regulatory, or policy materials below provide background for recurring issues in this practice area; they may not govern every monthly development. Counsel must identify the operative authority for the particular facts before advising on scope, duties, or relief.[1][2][3][4]
A disciplined operating response
Facilities should connect regulatory monitoring to permit terms, emissions inventories, capital plans, and the record supporting any requested revision. A headline alone rarely identifies the operative obligation.[1][3][4]
- Translate each federal or state-plan action into an applicability memo for affected units and permits.[1][3]
- Preserve emissions data, modeling assumptions, and agency communications in a review-ready record.[2][4]
- Separate immediate compliance obligations from proposed changes and anticipated litigation positions.[1][2]
What to watch next
Track whether an action is proposed or final, its effective date, any comment deadline, and related state proceedings. Litigation risk often turns on the administrative record and statutory pathway, not simply the policy direction.[1][2]
This February 2026 edition is an issue-spotting record, not a representation that every relevant authority was captured. The accepted ingest covered Federal Register and DOJ materials for the calendar month; case-law discovery, historical eCFR changes, dockets, corporate filings, and state sources remain subject to the limitations stated on this page.[1][2]