<h1>Input-output norms require imported inputs to match the materials actually used in exported PP woven sacks for compliance.</h1> Standard FTP input-output norms specify the bill of materials and net input relationships for coloured PP woven tube/sack with U.V. stabilization, eyelets and draw string. A mandatory compliance rule requires determination of permissible input proportions and obliges applicants to ensure imported goods match the inputs actually used or required in the export product.