The Australian Government announced its response to the Independent Review of the Australian Government’s Regulatory Impact Analysis (RIA) Process in December 2012. As a consequence of this announcement, some changes have been made to the RIA arrangements. The new RIA process applies from July 2013 and is detailed in the revised Best Practice Regulation Handbook. However a transition period will apply in the near term for regulatory proposals already being considered, especially those for which agencies have started to prepare a regulation impact statement (RIS) under the old system. During the transition period, the OBPR will allow for some flexibility regarding the application of the current and new RIA processes. However, a RIS will need to comply with either the old or the new RIA process. A RIS cannot be assessed under a ‘hybrid’ model. This guidance note provides further information on the arrangements that will apply for transition to the new RIA system. If you have any questions about the material contained in this guidance note, please contact the Office of Best Practice Regulation.