Out of curiousity, does anyone know whether the CAA and/or the FAA (a) requires to be shown the original parts incorporated in a restoration and (b) requires evidence that these came from the aircraft whose provenance is claimed – or is it a case that if the restorer says that an unspecified number of parts incorporated in the restoration emanate from aircraft type x with serial number y, that assertion is accepted by the CAA and/or FAA, without further enquiry, and that the restoration then becomes, for the purposes of the CAA and/or FAA, the aircraft whose provenance is claimed?