organisation involved in the maintenance of large aircraft used for commercial air transport, and components intended for fitment thereto, which shall be approved in accordance with the provisions of Annex II of the Regulation 2042/2003, an organization approved by a Contracting State, in accordance with the requirements of Annex 6, Part I, Chapter 8 — Aeroplane Maintenance, to perform maintenance of aircraft or parts thereof and operating under supervision approved by that State