Article 4

For the purposes of HS Code ex 2707, 2713 to 2715, ex 2901, ex 2902 and ex 3403 mentioned in column 1 of the Annex, simple operations such as cleaning, decanting, desalting, water separation, filtering, colouring, marking, obtaining a given sulphur content as a result of mixing products with different sulphur contents, any combination of these operations or like operations do not confer origin.