Input-output norms determine permissible packaging inputs and weight and wastage allowances for exported food products. Prescribed input-output norms specify permitted packing types for exported food products-OTS tinplate cans, relevant tin or glass containers, and specified polymer packing materials-and set weight conversion rules and wastage allowances, including net-to-net conversion and a defined wastage percentage. Schedules require determination of input proportions used in manufacture and obligate applicants to ensure imported goods are those actually used or required in the export product, enabling verification of permissible input use.