The Illinois DCEO programs are subject to the State appropriation process, and while the Department can accept and review applications, it will not be able to award funding, issue Notices to Proceed, or execute/modify grants until a State budget is finalized.

The Illinois Department of Commerce and Economic Opportunity (DCEO) Bureau of Energy and Recycling administers the public sector energy efficiency programs required by the Illinois Energy Efficiency Portfolio Standard (EEPS). As part of this larger program and the Illinois EEPS, the DCEO funds the Illinois Smart Energy Design Assistance Center (SEDAC) to administer and execute the Public Sector Building Retro-Commissioning (RCx) Program throughout Illinois. This program is limited to ComEd and Ameren Illinois electric service territories, though entities receiving natural gas from Ameren Illinois, Nicor, North Shore, or Peoples Gas may also be eligible for inclusion of natural gas savings measures.

SEDAC's Retro-Commissioning services are free for local, state, and federal governments; public school districts; community colleges; and universities that receive electricity distribution service from Commonwealth Edison (ComEd) or Ameren affiliated utilities (AmerenCILCO, AmerenIP, and AmerenCIPS) as a result of Illinois DCEO funding. Clients are required to implement at least $10,000 on building improvements based on recommendations, and must implement the measures within 10 months or by the program year deadline.

SEDAC is managed by the School of Architecture at the University of Illinois at Urbana-Champaign.