<h1>Input-output norms require imported chemical inputs to match prescribed export-use proportions and be verified for compliance.</h1> Standard input-output norms under the Foreign Trade Policy specify permissible inputs and normative quantities for Caustic Soda Flakes/Solid, including caustic soda lye and furnace oil. Applicants must ensure imported goods correspond to the listed inputs and are actually used or required in the declared export product, and that manufacturing uses conform to prescribed proportions and permitted categories.