<h1>Standard Input-Output Norms require specified input ratios for brass strip exports and verification that imported inputs match usage.</h1> The SION C161 prescribes input materials and purity standards for brass strips used in electrical, electronics, telecommunication, defence and automobile radiator applications, including zinc (min. 99.95% purity) and copper wire bars (min. 99.9% purity). The norms set input-to-output proportions of 1.05 Kg of specified input per Kg of export product and require applicants to ensure imported goods are those actually used or required in the manufacture of the export product.