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Calculate Follow the guides to determine if your product fulfils the rules of origin

Product
251990: Fused magnesia; dead-burned (sintered) magnesia, whether/not containing small quantities of other oxides added before sintering; other magnesium oxide, whether/not pure
Treaty
EAC
Select the rule that applies to your product:

Goods are considered originating if they have been produced in the member States wholly or partially from materials imported from outside the member States or of undetermined origin provided that: