<h1>Input-output norms dictate allowable import usage for anodised aluminium grills, requiring verification that imported inputs serve the export product.</h1> Standard input-output norms for anodised aluminium grills specify aluminium ingots as the primary input with a prescribed input ratio and require that applicants ensure imported goods are those used or required in manufacture of the exported product, with verification against the stated schedules and determinations of input proportions.