(a) States should periodically reevaluate priority classifications of all Regions or portion of Regions within their borders. The reevaluation must consider the three most recent years of air quality data. If the evaluation indicates a change to a higher priority classification, appropriate changes in the episode plan must be made as expeditiously as practicable.
(b) [Reserved]
← 40 CFR 51 sections · CFR library · Crosswalk
New and updated AFIs, supplements, and OSHA cross-references as we index them — straight to your inbox.