<h1>Input-output norms require specified input proportions for silicon carbide imports and importer assurance of export use.</h1> Standard input-output norms for silicon carbide require importers to use specified input proportions: A1860 lists silicon carbide with an input requirement matched to raw petroleum coke at a ratio of one to one and a half. The SION for this entry is suspended by Public Notice No. 03/2024-25 and applicants must ensure imported goods are those used or required in the export product and are subject to administrative determination of permissible input proportions.