Input-output norms for P.P. woven sacks set required input proportions and permitted components for export manufacturing. Foreign Trade Policy Input-Output Norms set the permitted input categories and required proportions for manufacture of P.P. woven sacks (including variants with liner, U.V. stabilization, lamination, or stitching). The schedule prescribes how to determine proportions of inputs for resultant products and requires applicants to ensure that imported goods are those actually used or required in the export product.