2127-AK74 201104 Unified Agenda of Federal Regulatory and Deregulatory Actions 2127 National Highway Traffic Safety Administration NHTSA 2100 Department of Transportation DOT Commercial Medium- and Heavy-Duty On-Highway Vehicles and Work Truck Fuel Efficiency Standards Economically Significant Previously Published in The Unified Agenda Final Rule Stage Yes Private Sector 49 CFR 535 49 CFR 523 49 CFR 534 49 USC 32902 delegation of authority at 49 CFR 1.50 Statutory Other 09/30/2010 NHTSA Study Statutory Final 09/28/2012 Final rule No NPRM 11/30/2010 75 FR 74151 NPRM Comment Period End 01/31/2011 Final Rule 08/00/2011 No No None No Yes www.regulations.gov www.regulations.gov No Yes 2060-AP61 Related to James Tamm 2127 National Highway Traffic Safety Administration NHTSA 202 493-0515 james.tamm@dot.gov 1200 New Jersey Avenue SE, Washington DC 20590