Code of Federal Regulations > Title 40 > Chapter I > Part 49 - PART 49—INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

Subpart A [§ 49.1 - § 49.50] - Subpart A—Tribal Authority

Subpart B [§ 49.51 - § 49.100] - Subpart B—General Provisions

Subpart C [§ 49.101 - § 49.173] - Subpart C—General Federal Implementation Plan Provisions

Subpart D [§ 49.201 - § 49.470] - Subpart D—Implementation Plans for Tribes—Region I

Subpart E [§ 49.471 - § 49.680] - Subpart E—Implementation Plans for Tribes—Region II

Subpart F [§ 49.681 - § 49.710] - Subpart F—Implementation Plans for Tribes—Region III

Subpart G [§ 49.711 - § 49.920] - Subpart G—Implementation Plans for Tribes—Region IV

Subpart H [§ 49.921 - § 49.1970] - Subpart H—Implementation Plans for Tribes—Region V

Subpart I [§ 49.1971 - § 49.3920] - Subpart I—Implementation Plans for Tribes—Region VI

Subpart J [§ 49.3921 - § 49.4160] - Subpart J—Implementation Plans for Tribes—Region VII

Subpart K [§ 49.4161 - § 49.5510] - Subpart K—Implementation Plans for Tribes—Region VIII

Subpart L [§ 49.5511 - § 49.9860] - Subpart L—Implementation Plans for Tribes—Region IX

Subpart M [§ 49.9861 - § 49.17810] - Subpart M—Implementation Plans for Tribes—Region X