1. FAA (2015) Federal aviation regulations part 23 Airworthiness Standards: Normal, Utility, Acrobatic, and Commuter Category Airplanes.
2. FAA (2015) Federal aviation regulations part 25 Airworthiness Standards: Transport Category Airplanes.
3. FAA (2015) Federal aviation regulations part 27 Airworthiness Standards: Normal Category Rotorcraft.
4. FAA (2015) Federal aviation regulations part 29 Airworthiness Standards: Transport Category Rotorcraft.
5. EASA (2019) Special Condition for VTOL and Means of Compliance