<h1>Suspension of Standard Input-Output Norms for Silicon Carbide under SION A1860; manufacturers must follow prescribed input ratios</h1> Standard input-output norms for silicon carbide under the Chemical & Allied Products schedule (SION A1860) have been suspended by the referenced public notice. The norm lists silicon carbide at 1 kg with an associated raw petroleum coke input of 1.50 kg. Applicants must adhere to prescribed input proportions for manufacturing resultant products and ensure that goods declared for import and actually imported are those used or required in the export product. Compliance with the specified input-output determinations is required.