<h1>Standard input-output norms require imported chemical inputs to match prescribed proportions and intended export use.</h1> Standard Input-Output Norms govern permitted proportions of chemical inputs for manufacture of specified export products, listing prescribed input quantities for Pheniramine maleate (A353) including 2-Benzyl Pyridine, and noting the SION entry has been suspended. Applicants must ensure imported goods conform to prescribed proportions and are actually used or required in the declared export product.