<h1>Standard input-output norms require imported chemical inputs to match declared export product inputs and conform to prescribed proportions.</h1> Standard input-output norms prescribe specific chemical inputs and acceptable substitutes for manufacture of Methocarbamol USP and require that competent authorities determine permissible proportions of those inputs. Applicants seeking import permission must ensure that imported goods correspond to the inputs required or used in the declared export product and conform to the prescribed input proportions.