• § 91.801 - Applicability: Relation to part 36.

• § 91.803 - Part 125 operators: Designation of applicable regulations.

• § 91.805 - Final compliance: Subsonic airplanes.

• §§ 91.807-91.813 - §[Reserved]

• § 91.815 - Agricultural and fire fighting airplanes: Noise operating limitations.

• § 91.817 - Civil aircraft sonic boom.

• § 91.818 - Special flight authorization to exceed Mach 1.

• § 91.819 - Civil supersonic airplanes that do not comply with part 36.

• § 91.821 - Civil supersonic airplanes: Noise limits.

• §§ 91.823-91.849 - §[Reserved]

• § 91.851 - Definitions.

• § 91.853 - Final compliance: Civil subsonic airplanes.

• § 91.855 - Entry and nonaddition rule.

• § 91.857 - Stage 2 operations outside of the 48 contiguous United States.

• § 91.858 - Special flight authorizations for non-revenue Stage 2 operations.

• § 91.859 - Modification to meet Stage 3, Stage 4, or Stage 5 noise levels.

• § 91.861 - Base level.

• § 91.863 - Transfers of Stage 2 airplanes with base level.

• § 91.865 - Phased compliance for operators with base level.

• § 91.867 - Phased compliance for new entrants.

• § 91.869 - Carry-forward compliance.

• § 91.871 - Waivers from interim compliance requirements.

• § 91.873 - Waivers from final compliance.

• § 91.875 - Annual progress reports.

• § 91.877 - Annual reporting of Hawaiian operations.

• §§ 91.879-91.880 - §[Reserved]

• § 91.881 - Final compliance: Civil subsonic jet airplanes weighing 75,000 pounds or less.

• § 91.883 - Special flight authorizations for jet airplanes weighing 75,000 pounds or less.

• §§ 91.884-91.899 - §[Reserved]