Article 19 2.

As regards the airworthiness and environmental compatibility of aircraft referred to in points (a) and (b) of Article 2(1), other than unmanned aircraft, and their engines, propellers, parts and non-installed equipment, the Commission is empowered to adopt delegated acts, in accordance with Article 128, to amend Annexes II and III, where necessary for reasons of technical, operational or scientific developments or evidence in the field of airworthiness or environmental compatibility, in order and to the extent required to achieve the objectives set out in Article 1.