Weld specimens shall be furnished to the address listed below at least ten (10) weeks in advance of production welding. The specimens are to be fabricated using the submitted welding procedure specification (WPS). Following (WPS) approval, the "weld specimen" and the "approved procedure" will be returned and is to be maintained by the supplier during the terms of the contract. For all parts that have been in continuous production and have not been affected by design changes, resubmission of weld specimens shall not be required unless the previously approved procedure is rejected.