Upon the written request of the last holder of a valid cotton class certificate and a showing to the satisfaction of the Area Director of the Marketing Services Office which issued such certificate, that it has been lost or destroyed and, if lost, that diligent effort has been made to find it without success, a new certificate shall be issued without the reclassification of the cotton and without a new Micronaire determination for the cotton. Such new certificate shall bear the same number and date of issuance as the lost or destroyed certificate, and shall include a statement to the effect that it is a duplicate issued in lieu of the lost or destroyed original, as the case may be.