<h1>Input-output norms require imported inputs to match prescribed material proportions for export manufacture, ensuring compliance with trade rules.</h1> Standard input-output norms set prescribed material proportions for manufacture of Rigid PVC film/sheet/foil (vacuum forming grade), listing constituent inputs and their proportional weights per kilogram of finished product. Applicants must ensure imported inputs correspond to those used in the export product, and verification will confirm that imported goods match declared usage and proportions for the resultant product.