20 ILCS 3125/10
"Agency" means the Environmental Protection Agency.
"Board" means the Capital Development Board.
"Building" includes both residential buildings and commercial buildings.
"Code" means the latest published edition of the International Code Council's International Energy Conservation Code as adopted by the Board, including any published supplements adopted by the Board and any amendments and adaptations to the Code that are made by the Board.
"Commercial building" means any building except a building that is a residential building, as defined in this Section.
"Municipality" means any city, village, or incorporated town.
"Residential building" means (i) a detached one-family or 2-family dwelling or (ii) any building that is 3 stories or less in height above grade that contains multiple dwelling units, in which the occupants reside on a primarily permanent basis, such as a townhouse, a row house, an apartment house, a convent, a monastery, a rectory, a fraternity or sorority house, a dormitory, and a rooming house; provided, however, that when applied to a building located within the boundaries of a municipality having a population of 1,000,000 or more, the term "residential building" means a building containing one or more dwelling units, not exceeding 4 stories above grade, where occupants are primarily permanent.
"Site energy index" means a scalar published by the Pacific Northwest National Laboratories representing the ratio of the site energy performance of an evaluated code compared to the site energy performance of the 2006 International Energy Conservation Code. A "site energy index" includes only conservation measures and excludes net energy credit for any on-site or off-site energy production.
20 ILCS 3125/10