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40 CFR 51.906

§ 51.906 Redesignation to nonattainment following initial designations for the 8-hour NAAQS.

United States · 40 CFR — Protection of Environment · Status: effective

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40 CFR 51.906, § 51.906 Redesignation to nonattainment following initial designations for the 8-hour NAAQS, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/169883
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For any area that is initially designated attainment or unclassifiable for the 8-hour NAAQS and that is subsequently redesignated to nonattainment for the 8-hour ozone NAAQS, any absolute, fixed date applicable in connection with the requirements of this part is extended by a period of time equal to the length of time between the effective date of the initial designation for the 8-hour NAAQS and the effective date of redesignation, except as otherwise provided in this subpart.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.