<h1>Standard input-output norms require imported inputs to match permitted inputs for the export product, ensuring compliance verification.</h1> Standard input-output norms specify permitted input quantities and interchangeable precursors for isonicotinic acid manufacture, identifying Gamma Picoline and 4-Cyanopyridine as inputs relative to one kilogram of product. Applicants must ensure imported goods correspond to the inputs actually used or required in the export product and adhere to the determined proportions.