<h1>Foreign trade rule: require determining proportions of inputs and matching imported components to actual use in exported products</h1> Standard input-output norms under the foreign trade policy specify a 40 W twin-tube box-type industrial fitting pre-wired with vacuum pressure-impregnated copper-wound open-type ballast, power factor improvement capacitor, starters, starter seat, mains terminal and lamp holders. Component details list CRCA sheet (2.5 kg), two ballasts, four holders, one capacitor and two starters per unit. The provision requires determination of the proportion of various inputs used in manufacture of resultant products and mandates that imported goods match those actually required and used in the export product.