19 CFR § 146.92 - Definitions.
---
identifier: "/us/cfr/t19/s146.92"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "19 CFR § 146.92 - Definitions."
title_number: 19
title_name: "Customs Duties"
section_number: "146.92"
section_name: "Definitions."
chapter_name: "U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY"
part_number: "146"
part_name: "FOREIGN TRADE ZONES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "19 U.S.C. 66, 81a-81u, 1202 (General Note 3(i), Harmonized Tariff Schedule of the United States), 1623, 1624."
regulatory_source: "T.D. 86-16, 51 FR 5049, Feb. 11, 1986, unless otherwise noted."
cfr_part: "146"
---
# 146.92 Definitions.
(a) *Attribution.* “Attribution” means the association of a final product with its source material.
(b) *Feedstocks.* “Feedstocks” means crude petroleum or intermediate product that is used in a petroleum refinery to make a final product.
(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.
(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.
(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.
(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.
(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.
(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.
(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.
(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.
(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.