Input-output norms set importable input proportions for single-phase shell motors, requiring imported components be used in export products. Input-output norms prescribe admissible inputs and specified per-unit allowances for manufacture of single phase shell construction motors under SKD condition, listing metals, mechanical parts, insulation and consumables with unit or net-to-net/FOB-linked measures. Applicants must determine proportions of inputs used for resultant export products and ensure imported goods are those actually used or required in the export product.