Part 3 of the Directives addresses the certification and administration of Approved Training Organisations (ATO). Part 3 uses Standards contained in ICAO Annex 1 for the approval of training organisations and has also adapted these Standards to cover other areas of airman training. The use of an ATO for the training and qualification of airmen is common in modern aviation, most particularly as operators upgrade their aircraft inventory and airmen transition to new aircraft. The interrelation between ATO requirements under Part 3 and the licensing and certification requirements of Part 2 is plain. The requirements for ATO operation apply to the standards required for adequate training for qualification for a Ghanaian certification. Thus, where personnel who require Ghanaian certification receive training from a foreign ATO, the foreign ATO shall meet ATO standards contained in this Part. This situation will be encountered when a Ghanaian Air Operator Certificate (AOC) holder, such as a national airline, is part of a regional consortium with AOC holders from other Contracting States in the region, and the consortium has established an ATO in only one of the regional Contracting States.