U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 52Subpart LL - Subpart LL—Oklahoma
§ 52.1919 - [Reserved]
§ 52.1920 - Identification of plan.
§ 52.1921 - Classification of regions.
§ 52.1922 - Approval status.
§ 52.1923 - Best Available Retrofit Requirements (BART) for SO2 and Interstate pollutant transport provisions; What are the FIP requirements for Units 4 and 5 of the Oklahoma Gas and Electric Muskogee plant; and Units 1 and 2 of the Oklahoma Gas and Electric Sooner plant affecting visibility?
§§ 52.1924-52.1927 - §[Reserved]
§ 52.1928 - Visibility protection.
§ 52.1929 - Significant deterioration of air quality.
§ 52.1930 - Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of nitrogen oxides?
§ 52.1931 - Petroleum storage tank controls.
§§ 52.1932-52.1933 - §[Reserved]
§ 52.1934 - Prevention of air pollution emergency episodes.
§ 52.1935 - Small business assistance program.
§ 52.1960 - Original Identification of plan section.
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