The ICC is comprised of the International Conference of Building Officials (ICBO), Building Officials and Code Administrators (BOCA) and the Southern Building Code Congress International (SBCCI). The code is a model code that may be adopted by code jurisdictions in the United States or internationally. Currently, ASHRAE Standard 90.1-1999 is referenced in the existing code.
The 2001 standard provides the minimum requirements for the design of energy efficient buildings. It is written in mandatory, enforceable language, which can be adopted into building codes, and now addresses modifications to existing buildings.