- OST Form 4507 - Air Taxi Operator Registration and Amendments and Filing Fee for an initial registration through Pay.gov
- OST Form 6410 - U.S. Air Carriers Certificate of Insurance, and
- OST Form 6411 - Foreign Air Carriers Certificate of Insurance.
FAA Technical Programs Branch Part 205 Insurance and Part 298 Exemptions
Department of Transportation (DOT) Air Carrier Fitness Division U.S. Air Carriers