Illinois Adoption Model Policy
August 28, 2009, Governor Pat Quinn signed the Energy Efficient Building Act into law. The Act established a statewide residential energy code (for the first time), which requires that newly constructed residential buildings meet the minimum standards set forth in the most recent version of the International Energy Conservation Code (2009 IECC). The Illinois Capital Development Board (CDB) must now review and adopt the code through an administrative proceeding. The Illinois Capital Development Board adopts each new version of the IECC within 9 months of its publication, with an effective date 3 months afterwards. Administrative rules for the law are developed by CDB and approved by the General Assembly's Joint Committee on Administrative Rules (JCAR). Illinois has adopted the last three published versions of ASHRAE/IESNA Standard 90.1. The state is now on track to adopt both residential and commercial consistently. Illinois adopted the 2009 IECC/ASHRAE 90.1-2007 on January 29, 2010. The IECC 2012/ASHRAE 90.1-2010 is expected to be adopted January 2012.