As regards air traffic controllers, persons and organisations involved in the training, testing, checking or medical assessment of air traffic controllers, as well as synthetic training devices, the Commission is empowered to adopt delegated acts in accordance with Article 128, to amend Annex VIII, where necessary for reasons of technical, operational or scientific developments or safety evidence related to the training organisations and air traffic controllers, in order and to the extent necessary to achieve the objectives set out in Article 1.