Standard Input-Output Norms for mathematical instrument boxes require specified input proportions and verification of imported materials' use.

Standard Input-Output Norms for a Mathematical Instrument Box with/without PVC Trey specify input weight ratios for M.S. sheet (box and compass), PVC granules (trey), polystyrene (plastic article) and polypropylene per kilogram of export product, and impose an obligation on applicants to ensure that imported inputs correspond to and are consumed in the exported goods; the norms are noted as suspended by public notice.

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