Standard Input-Output Norms added for resistance welding products, specifying eligible copper-alloy inputs and import-export input ratios. Amendment to the Handbook of Procedures (Vol.2) adds SION entries C-2040-C-2044 for resistance welding products, specifying covered export items and identifying relevant copper-alloy input materials by form and type, and establishing the operative import-to-export input-output ratio to be used for compliance.