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Follow the guides to determine if your product fulfils the rules of origin
Product
391390: Natural polymers & modified natural polymers (e.g., hardened proteins, chemical derivatives of natural rubber), other than alginic acid, its salts & esters, in primary forms
Treaty
SADC
Rule
Manufacture in which: all the materials used are classified within a heading other than that of the product; and all the materials of heading No. 3915 used must be wholly produced