Input-output norms require declared precious metal inputs to match accounted export content and meet purity and equivalence standards. Standard input-output norms prescribe minimum purity standards for specified precious metal products and classify qualifying inputs as ores/concentrates or waste and scrap. The norms set input equivalence based on precious metal content to be matched to the export product, require each declared precious metal on import documents to be accounted for in exports, and impose on applicants the obligation to ensure imported inputs are those used and required in the export product with proportions determined by the schedules.