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Regulations last checked for updates: Dec 15, 2025
Title 14 - Aeronautics and Space last revised: Nov 03, 2025
All Titles
Title 14
Chapter I
Part 121
Subpart E - Subpart E—Approval of Routes: Domestic and Flag Operations
§ 121.91 - Applicability.
§ 121.93 - Route requirements: General.
§ 121.95 - Route width.
§ 121.97 - Airports: Required data.
§ 121.99 - Communications facilities—domestic and flag operations.
§ 121.101 - Weather reporting facilities.
§ 121.103 - En route navigation facilities.
§ 121.105 - Servicing and maintenance facilities.
§ 121.106 - ETOPS Alternate Airport: Rescue and fire fighting service.
§ 121.107 - Dispatch centers.
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