Information about Aerial application air operator's certificate Find out about and apply for an aerial application AOC. Air transport air operator's certificate Find out about applying for, changing or renewing an air transport Air Operator's Certificate (AOC). Apply for an aerial work certificate (Part 138) Find out about and apply for an aerial work certificate. Balloon transport air operator's certificate Find out about and apply for a balloon transport AOC. Explanation of ICAO Taxonomy This letter is designed for AOC holders to explain how Australia is implementing taxonomy designators for aircraft. Find an air operator Search our list of air transport and aerial application AOC holders. Flight training operators Learn about the assessment process and the regulations for flight training activities. Foreign operators Find out what you need to operate a foreign registered aircraft in Australian territory. Gaining a Part 91 approval Find out about and apply for approvals required for particular activities under Part 91. Replace lost or damaged air operator's certificate Find out how to apply for a replacement AOC. Show more Show more Show less Alternative pathways for specialised endorsements Alternative pathway for specialised endorsements Learn about the alternative pathway for specialised endorsements and how to access them. Alternative pathway - operators Learn about the alternative pathway for specialised endorsements and how to access them. Alternative pathway - pilots Learn how pilots can access the instrument to receive training and testing for an endorsement. Alternative pathway - training pilots Learn how operators can use the instrument to deliver training for specialised endorsements in-house. Show more Show more Show less Also see Application guidance for flight training organisations Find out about certification for flight training organisations and how to apply for a Part 141 or Part 142 certificate. Show more Show less