Essential requirements
Article 9
1. 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 shall comply with the essential requirements for airworthiness set out in Annex II to this Regulation. 2. As regards noise and emissions, those aircraft and their engines, propellers, parts and non-installed equipment shall comply with the environmental protection requirements contained in Amendment 12 of Volume I, in Amendment 9 of Volume II, and in the initial issue of Volume III, all as applicable on 1 January 2018, of Annex 16 to the Chicago Convention. The essential requirements for environmental compatibility set out in Annex III to this Regulation shall apply to products, parts and non-installed equipment to the extent that the provisions of the Chicago Convention referred to in the first subparagraph of this paragraph do not contain environmental protection requirements. Organisations involved in the design, production and maintenance of products referred to in points (a) and (b) of Article 2(1) shall comply with point 8 of Annex III to this Regulation.