MIL-STD-1261:

Weld specimens shall be furnished to the address listed below at least ten (10) weeks in advance of production welding. These specimens are to be fabricated using the submitted welding procedure specification (WPS). Following (WPS) approval, the "weld specimen" and "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.

or

SD-X12140:

Weld specimens shall be furnished for new welding procedure specifications (WPS) or when procedure parameters are outside previously approved limits. Weld specimens, as applicable, shall be furnished to the address listed below at least ten (10) weeks in advance of production welding. Following (WPS) approval, the "weld specimens" and "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.

					General Dynamics Land Systems Division
					Lima Assembly Tank Plant
					1161 Buckeye Road
					Lima, Oh 45804

					Attn:  Material Control Laboratories