19 CFR §146.92

1. (a)Attribution. “Attribution” means the association of a final product with its source material.
2. (b)Feedstocks. “Feedstocks” means crude petroleum or intermediate product that is used in a petroleum refinery to make a final product.
3. (c)Feedstock factor. “Feedstock factor” means the relative value of final products utilizing T.D. 66-16 (see § 146.92(h)), and which takes into account any volumetric loss or gain.
4. (d)Final product. “Final product” means any petroleum product that is produced in a refinery subzone and thereafter removed therefrom or consumed within the zone.
5. (e)Manufacturing period. “Manufacturing period” means a period selected by the refiner which must be no more than a calendar month basis, for which attribution to a source feedstock must be made for every final product made, consumed in, or removed from the refinery subzone.
6. (f)Petroleum refinery. “Petroleum refinery” means a facility that refines a feedstock listed on the top line of the tables set forth in T.D. 66-16 into a product listed in the left column of the tables set forth in T.D. 66-16.
7. (g)Price of product. “Price of product” means the average per unit market value of each final product for a given manufacturing period or the published standard product value if updated each month.
8. (h)Producibility. “Producibility” is a method of attributing products to feedstocks for petroleum manufacturing in accordance with the Industry Standards of Potential Production set forth in T.D. 66-16.
9. (i)Relative value. “Relative value” means a value assigned to each final product attributed to the separation from a privileged foreign feedstock based on the ratio of the final product's value compared to the privileged foreign feedstock's duty.
10. (j)Time of separation. “Time of separation” means the manufacturing period in which a privileged foreign status feedstock is deemed to have been separated into two or more final products.
11. (k)Weighted average. “Weighted average” means the relative value of merchandise, which is determined by dividing the total value of shipments in a given period by the total quantity shipped in the same given period. See example in section VI of the appendix to this part.