On March 13, 2012, the US Environmental Protection Agency, Office of Enforcement and Compliance Assurance, provided notice to associations and group representatives of owners of existing Area Source (GACT) boilers that the agency will exercise its discretion not to pursue enforcement for violations of the deadline to complete initial tune-up required in the final rule by March 12, 2012. In addition, the US EPA recently published a proposed re-consideration of the Area Source Boiler Rule that would postpone the tune-up from March 12, 2012 to March 12, 2013. This "No Action Assurance" applies to only the timelines of tune-up and the US EPA notes that nothing in this "No Action Assurance" affects any other provisions in the Area Source Boiler Rule. The "No Action Assurance" is to remain in effect until either (1) 11:59PM EDT October 1, 2012, or (2) the effective date of a final rule addressing the proposal reconsideration of the Area Source Boiler Rule, whichever occurs earlier.