Last week, the Department of Energy issued two Notices related to the application of its certification and enforcement regulations. First, the Department issued a Request for Information seeking information and data related to the use of computer simulations, mathematical methods, and other alternative methods of determining the efficiency of certain types of consumer products and commercial and industrial equipment. Comments are requested on or before May 18, 2011. Second, the Department issued a Notice of Proposed Rulemaking tentatively proposing an 18-month extension to the compliance date for manufacturers of certain commercial and industrial equipment. Comments are due on or before May 19, 2011.