Input Output Norms govern permissible import quantities for PVC tarpaulin exports, adjusted proportionately to coating weight. Input Output norms specify permitted import quantities and alternatives for inputs used in PVC tarpaulin drop cloths per square metre of finished product and require applicants to use imported inputs in the exported goods. Where coating weight differs from the nominal 1000 g/sq. m., quantities for PVC resin and certain inputs are adjusted by the formula AxB/1000 (A = quantity allowed for 1000 g coating weight; B = proposed coating weight); allowances for other inputs remain unchanged.