U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 40Chapter IPart 52Subpart WW - Subpart WW—Washington
§ 52.2470 - Identification of plan.
§ 52.2471 - Classification of regions.
§ 52.2472 - [Reserved]
§ 52.2473 - Approval status.
§§ 52.2474-52.2475 - §[Reserved]
§ 52.2476 - Discretionary authority.
§ 52.2477 - Original identification of plan section.
§§ 52.2478-52.2494 - §[Reserved]
§ 52.2495 - Voluntary limits on potential to emit.
§ 52.2496 - [Reserved]
§ 52.2497 - Significant deterioration of air quality.
§ 52.2498 - Visibility protection.
§§ 52.2499-52.2500 - §[Reserved]
§ 52.2501 - Best available retrofit technology (BART) requirement for the Tesoro Refining and Marketing Company oil refinery—Better than BART Alternative.
§ 52.2502 - [Reserved]
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