The Air Quality Control Commission will hold a public rulemaking hearing to consider a proposal to reduce the levels of emissions that cars and light-duty trucks are required to meet under the emission testing requirements of the program in the seven-county Denver metropolitan area. The hearing will be held March 20, 2008. Comments are due March 6, 2008. http://www.cdphe.state.co.us/op/aqcc/aqccdown/Reg11marchnotice.pdf.