product if such product is— (A) described in subsection (a) and not subject to an exception under section 4692(d)(2), or (B) added pursuant to subsection (d) or (e). (c) Naturally occurring covered products (1) Pollution intensity calculations In the case of a naturally occurring covered product which is refined in a manner whereby such product becomes a transforming part for multiple other products (referred to in this paragraph as a resulting product ), the pollution intensity associated with the refining of the naturally occurring covered product shall be divided between the resulting products in a manner consistent with the proportion of the naturally occurring product which is utilized in each resulting product and the quantity of each resulting product. (2) Definition For purposes of this subsection, the term naturally occurring covered product means crude oil or minerals. (d) Additional covered products (1) In general An eligible entity may submit a petition (or, in the case of more than one eligible entity, may jointly submit a petition) to the Secretary for any product (based on the 6-digit subheading number of the product under the HTS) to be included as a covered product for purposes of this subchapter. (2) Eligible entity For purposes of this subsection, the term eligible entity means, with respect to any product— (A) a domestic producer of such product, (B) trade organizations consisting of producers of such product, (C) labor unions representing individuals employed in the production of such product, and (D) individuals employed in the production of such product. (3) Threshold The Secretary may not approve a petition described in paragraph (1) with respect to any product unless not less than 50 percent of the total annual domestic production with respect to such product is attributable to domestic producers which are represented in such petition. (4) Measurement (A) In general For purposes of determining whether the total annual domestic production requirement under paragraph (3) has been