Blended yarn containing flax and polyester: input-output norms set fibre quantities and require imported inputs to match the export product. Standard input-output norms for blended yarn containing flax and polyester set component requirements of flax fibre at 1.66 kg/kg of export product and polyester staple fibre at 1.05 kg/kg; applicants must ensure imported goods correspond to those used or required in the declared export product.