The IAB (published biweekly) is the official notice of all proposed and adopted changes to the rules in the Iowa Administrative Code (IAC); documents that pertain to the business of the Administrative Rules Review Committee (ARRC); Executive Orders; and other documents as prescribed by statute. The IAC Supplement (published biweekly) contains replacement chapters incorporating amendments to rules in the IAC. Official editions of the IAB and IAC Supplement begin on 07/02/2008.