Origin determination rules for not wholly produced goods set conditions for preferential treatment based on processing and input origin. Products may qualify for preferential treatment if non originating inputs do not exceed a prescribed share of f.o.b. value and the final manufacturing process occurs within the exporting Contracting Party, subject to additional requirements. Non originating materials are sufficiently worked when the finished product falls in a different four digit HS heading from all such inputs. Specified minimal operations (preservation, simple cleaning, packing, labelling, simple mixing or assembly, slaughter, and combinations) are excluded from conferring origin. Valuation of non originating materials is by c.i.f. import value where provable, or otherwise the earliest ascertainable price paid locally.