Standard input-output norms govern permissible inputs for tin-plate battery covers, requiring imported goods to match export use.

Standard input-output norms cover Bottom and Top covers of round battery jackets made of tin plate, specifying 1 kg for the cover and 1.25 kg of Electrolytic Tin Plate Prime. The regime requires determination of permissible input proportions for manufacture and obliges applicants to ensure imported inputs are those actually used or required in the export product.

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