1. eCFR.Code of Federal Regulations Title 49 ‐ Transportation.2022.https://www.ecfr.gov/current/title-49. Accessed February 07 2022.
2. International Civil Aviation Organization.2022.https://www.icao.int/Pages/default.aspx. Accessed February 07 2022.
3. International Air Transport Association.2022.https://www.iata.org/. Accessed 07 February 2022.