The Department of Public Health and Environment proposed to adopt Regulation No. 20. The proposed adoption would incorporate specific provisions of California's low-emission vehicle standards for new light-duty and medium-duty motor vehicles sold in Colorado beginning in the 2022 model year. A hearing will be held November 14, 2018. Comments are due October 30, 2018. See https://www.sos.state.co.us/CCR/Upload/NoticeOfRulemaking/AddInfoAttach….