One approach would require power plants to meet emissions standards reflecting the application of the maximum achievable control technology mact determined according to the procedure set forth in section 112 d of the clean air act. The information provided is the latest available prior to signature of the proposal package. March 9 2015 epa issued an interim final rule that will allow owners or operators of electric generating units to submit to epa in pdf format emissions and compliance reports for the mercury and air toxics rule.