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U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 52 - PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
Subpart A [§ 52.01 - § 52.46] - Subpart A—General Provisions
Subpart B [§ 52.49 - § 52.69] - Subpart B—Alabama
Subpart C [§ 52.70 - § 52.98] - Subpart C—Alaska
Subpart D [§ 52.119 - § 52.153] - Subpart D—Arizona
Subpart E [§ 52.170 - § 52.200] - Subpart E—Arkansas
Subpart F [§ 52.220 - § 52.285] - Subpart F—California
Subpart G [§ 52.319 - § 52.354] - Subpart G—Colorado
Subpart H [§ 52.369 - § 52.387] - Subpart H—Connecticut
Subpart I [§ 52.420 - § 52.465] - Subpart I—Delaware
Subpart J [§ 52.470 - § 52.515] - Subpart J—District of Columbia
Subpart K [§ 52.519 - § 52.540] - Subpart K—Florida
Subpart L [§ 52.569 - § 52.590] - Subpart L—Georgia
Subpart M [§ 52.620 - § 52.634] - Subpart M—Hawaii
Subpart N [§ 52.670 - § 52.691] - Subpart N—Idaho
Subpart O [§ 52.719 - § 52.750] - Subpart O—Illinois
Subpart P [§ 52.769 - § 52.800] - Subpart P—Indiana
Subpart Q [§ 52.820 - § 52.842] - Subpart Q—Iowa
Subpart R [§ 52.869 - § 52.884] - Subpart R—Kansas
Subpart S [§ 52.919 - § 52.941] - Subpart S—Kentucky
Subpart T [§ 52.970 - § 52.1018] - Subpart T—Louisiana
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