Natural Res. Def. Council v. Envtl. Prot. Agency, No. 10-1056 (D.C. Cir. 2011)
Annotate this CaseThis case stemmed from a challenge to the EPA's regulation of ozone under the Clean Air Act, 42 U.S.C. 7409(a). At issue was an EPA "guidance document" addressing obligations of regions still in nonattainment of a now-revoked ozone air quality standard. The court held that the Guidance qualified as a legislative rule that the EPA was required to issue through notice and comment rulemaking and that one of its features, the so-called attainment alternative, violated the Clean Air Act's plain language. Therefore, the court granted the petition for review and vacated the Guidance.
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