The Environmental Protection Agency published a Proposed Rule June 7, 2012 regarding the treatment of emergency engines used in demand response programs in the National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines and the New Source Performance Standards for Stationary Internal Combustion Engines regulations. Demand response programs are critical to keeping the nation’s electric grid stable, energy efficient, and cost effective. The agency sent the proposed rule to the Office of Management and budget for interagency review on December 7. The agency was scheduled to release the final RICE NESHAP rule December 14, but the agency and the co-litigants EnerNOC, Inc., Innoventive Power and Johnson Controls, Inc. signed a modified agreement on December 12th that provides a one-month extension, to January 14, for finalization of the rule.