HB 4665 was signed into law August 13, 2012 as Public Act 97-0953.
The bill "creates the Radon Resistant Construction Act and
amends the Radon Industry Licensing Act. Provides for the Illinois
Emergency Management Agency to have primary responsibility for State
radon mitigation efforts. Requires all new residential construction to
include passive radon resistant construction. Allows local governmental
units to administer and enforce its radon construction regulations that
are at least as stringent as those established by the Agency. Requires
recommendations by the Task Force on Radon-Resistant Building Codes by
January 1, 2013 regarding radon resistant construction in new
residential construction. Generally effective June 1, 2013, except that
the provisions relating to recommendations by the Task Force on
Radon-Resistant Building Codes take effect upon becoming law."
Details of the bill are available at http://www.ilga.gov/legislation/billstatus.asp?DocNum=4665&GAID=11&GA=97&DocTypeID=HB&LegID=64454&SessionID=84.