Standard input-output norms for tin products govern allowable input proportions and require import-export input consistency.

Standard Input-Output Norms under the Foreign Trade Policy set permissible input-output relationships for tin products; the SION entry for Tin Metal (minimum 99.5% purity) and related tin concentrates and higher-purity tin metal is suspended by public notice. The framework mandates determination of the proportion of various inputs used in manufacture of resultant products and requires applicants to ensure imported goods correspond to the inputs used or required in the export product.

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