publish the results of that review. The Administrator may, if appropriate, add any source categories to this list by rule. (3) Removal of a Source Category from the List The Administrator may remove a source category from this list only if— (A) the total emissions from the entire source category which are taxable under this section have been less than 250,000 metric tons of carbon dioxide equivalent per year for each of three consecutive years, (B) the average emissions from facilities in the source category which are taxable under this section have been less than 25,000 metric tons of carbon dioxide equivalent per year for each of the years referred in subparagraph (A), and (C) the Administrator determines that there is no reasonable possibility that the total emissions from the entire source category which are taxable under this section will exceed 250,000 metric tons per year of carbon dioxide equivalent within any of the five years following such determination. (4) Addition of a Source Category to the List The Administrator may add a source category to this list only if the Administrator determines that— (A) the total emissions from the entire source category which are taxable under this section have been greater than 250,000 metric tons per year of carbon dioxide equivalent in any two years out of the preceding five years, (B) the average emissions from facilities in the source category which are taxable under this section have been greater than 25,000 metric tons per year of carbon dioxide equivalent in the years in which emissions from the entire source category have been greater than 250,000 tons per year, and (C) there is a reasonable possibility that the total emissions from the entire source category which are taxable under this section will be greater than 250,000 metric tons per year of carbon dioxide equivalent in any year within the next five years following such determination. (5) The Administrator may add a source category to the list that has previously been removed pursuant to paragraph (3) if