Federal Information & News Dispatch, Inc.

SUMMARY: EPA is taking final action to make nonconformance penalties (NCPs) available to manufacturers of heavy heavy-duty diesel engines in model years 2012 and 2013 for emissions of oxides of nitrogen (NO<X>). In general, the availability of NCPs allows a manufacturer of heavy-duty engines (HDEs) whose engines fail to conform to specified applicable emission standards, but do not exceed a designated upper limit, to be issued a certificate of conformity upon payment of a monetary penalty to the United States Government. The upper limit associated with these NCPs is 0.50 grams of NO<X> per horsepower-hour.

EFFECTIVE DATE: This rule is effective January 31, 2012. We will accept comments on this interim final rule until April 4, 2012.

ADDRESSES: Submit your comments, to Docket EPA-HQ-OAR-2011-1000, by one of the following methods: http://www.regulations.gov: Follow the on-line instructions for submitting comments.

Email: a-and-r-docket@epa.gov.

Fax: EPA: (202) 566-9744.

Mail: EPA: Air Docket, Environmental Protection Agency, EPA Docket Center, Mailcode: 2822T, 1200 Pennsylvania Ave. NW., Washington, DC 20460.

Hand Delivery: EPA: EPA Docket Center, (Air Docket), U.S. Environmental Protection Agency, EPA West Building, 1301 Constitution Ave. NW., Room: 3334, Mail Code: 2822T, Washington, DC. Such deliveries are only accepted during the Docket's normal hours of operation, and special arrangements should be made for deliveries of boxed information.