covered products under section 4692(b), the Secretary and the Board shall develop consistent methods for calculating the pollution intensity of any covered product which are specific to the country of origin. (b) Form (1) In general With respect to any covered product, the pollution intensity of such product shall be expressed based on the average pollution intensity associated with the manufacturing of such product (including point source pollution and upstream pollution) in the country of origin. (2) Specificity (A) In general To the maximum extent practicable, the pollution intensity of a covered product shall be specific to the applicable 6-digit HTS subheading number. (B) Crude oil In the case of a covered product described in section 4695(a)(4), the pollution intensity of the covered product shall be specific to the applicable 8-digit HTS subheading number. (3) Exception In the case of a covered product (with the exception of a covered product described in section 4695(a)(4)) for which data is not available to determine pollution intensity in a manner specific to the 6-digit HTS subheading number, the Secretary and the Board may determine the pollution intensity based on the applicable 4-digit HTS heading. (c) Data (1) In general To the extent necessary for any determination with respect to any covered product, the Secretary and the Board may use— (A) economic, statistical, and engineering models and analysis, (B) pollution monitoring data from facilities, satellites, and other pollution monitoring tools, provided that such data— (i) is publicly available, or (ii) is not publicly available but is able to be accessed and verified on a consistent basis by the Secretary or the head of any relevant Federal agency, (C) voluntarily reported data, provided that such data is— (i) a product of monitored emissions, and (ii) able to be verified by the Secretary or the Board, (D) the best available information on technology performance levels for the industrial sector that produces such product, and (E) manufacturing