Under a final rule published August 10, the Department of Energy will revamp energy efficiency standards for federal government buildings. Under the rule, the standards that will be updated for new federal buildings should reflect revisions to the voluntary American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Standard 90.1-2007, as well as the 2009 International Conservation Code (IECC). The standards apply to federal buildings developed for industrial or public purposes, government residential buildings, and low-rise residential buildings. ASHRAE Standard 90.1 applies to federally owned office buildings and other public buildings, and the IECC applies to low-rise residential buildings. According to the final rule, under Section 305 of the Energy Conservation and Production Act, as amended by the Energy Policy Act of 2005, the Department of Energy must ensure federal building energy efficiency performance standards for new federal buildings are 30 percent below the levels set in the ASHRAE and IECC standards.