The Department of Environmental Quality proposed to repeal 18 Ariz. Admin. Code 2.18, Clean Car Standards. Arizona originally adopted the measure based on the Climate Change Advisory Group§s Recommendation for reducing greenhouse gases, based on California's low emission vehicle program, but the department proposed eliminating the measure as new federal standards are similar to California's requirements. In addition, according to the department, the zero emission vehicle mandate is too costly or impractical for Arizona. The timetable for comments and the department's decision will be announced in the Notice of Proposed Rulemaking. http://www.azsos.gov/public_services/Register/2011/11/docket.pdf.