The Department of Environmental Quality proposed to amend Regulations for the Prevention of Significant Deterioration of Air Quality. Changes would remove provisions excluding certain amendments to 40 C.F.R. §52.21 from the regulation. There will be a public hearing April 21, 2011. http://www.deq.state.ms.us/newweb/MDEQRegulations.nsf/f75488ee863070bd86256df300511acf/b72abf9fa7b97cf78625785c0068fa45?Openhttp://www.deq.state.ms.us/newweb/MDEQRegulations.nsf/f75488ee863070bd86256df300511acf/b72abf9fa7b97cf78625785c0068fa45?OpenDocument.