The Origin of Goods (Petroleum Products) Regulations 1988

5.  Subject to the provisions of regulation 3(3) above, goods of a description specified in the Schedule hereto, and produced or manufactured in a country from imported materials, shall be treated as originating in that country provided they have undergone there the process specified in column 3 of the Schedule, unless such goods fall to be classified in a different heading from the materials from which they were produced or manufactured by reason only of the performance of one or more of the following minor processes, namely—

(i) operations intended solely to ensure that the goods remain in good condition during transit or storage (including freezing);

(ii) packing, repacking, bottling or splitting up into or assembling into consignments;

(iii) marking or labelling;

(iv) mixing — where any of the components mixed is an imported product.