Standard input-output norms set permitted input proportions for musical instrument covers; imports must match actual use.

Standard input output norms for covers for musical instruments list permitted input categories and their proportionate usage relative to the export product (including PVC laminated synthetic fabrics, synthetic lining, flocked velvets, sliders net to net, zippers, polypropylene yarn/webbing/granules, P.U. foam, and polyacetal). Applicants must ensure imported inputs are those actually used or required in the export product; authorities will determine permissible proportions of each input in manufacture.

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