General: All pressed parts delivered with VL or works (W) certificate shall be made at works approved by the Society for the type, grade and thickness of pressed parts being supplied and for the relevant processing route as per [1] to [4] and Sec.4, see also Ch.1 Sec.2 [2.2.2]. The forming and heat treatment shall be carried out in accordance with the manufacturer’s established procedures describing each operational and controlling step.