Input-output norms require specified precursor equivalence and verification that imported inputs are used in exported copper sulphate.

Input-output norms under SION A1099 for Copper Sulphate (with five molecules of crystallisation) specify equivalent precursor inputs-either copper scrap (84% copper) or copper oxide (40% copper)-for production; schedules determine permissible input proportions and applicants must ensure imported goods are those used or required in the exported product, with verification of actual use.

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