Added the text, "the Administrator of the EPA has approved" and "which" in subsection (1) of the PM2.5 Precursor definition. EDITOR'S NOTE: The original proposed amendment upon which this change in proposed rule (CPR) was based was published in the April 1, 2018, issue of the Utah State Bulletin, on page 41. Underlining in the rule below indicates text that has been added since the publication of the proposed rule mentioned above; strike-out indicates text that has been deleted. You must view the CPR and the proposed amendment together to understand all of the changes that will be enforceable should the agency make this rule effective.)