19 C.F.R. § 10.876
(a) General. For purposes of § 10.873(b) of this subpart and, except as provided in paragraph (b) of this section, the value of a material produced in the territory of one or both of the Parties includes the following:
(b) Exception. If the relationship between the producer of a good and the seller of a material influenced the price actually paid or payable for the material, or if there is no price actually paid or payable by the producer for the material, the value of the material produced in the territory of one or both of the Parties includes the following: