Energy.gov

''Note: Much of the information presented in this summary is drawn from the U.S. Department of Energy’s (DOE) Building Energy Codes Program and the Building Codes Assistance Project (BCAP). For more detailed information about building energy codes, visit the [http://www.energycodes.gov/states/ DOE] and [http://bcap-ocean.org/ BCAP] web sites.''

Arizona is a home rule state, thus codes are adopted and enforced at the local level. Developing a statewide code would require legislative action.