On January 31, 2011 the American Gas Association (AGA) and America’s Natural Gas Alliance (ANGA) submitted these comments on the proposed fuel efficiency regulations for medium- and heavy-duty vehicles published by the National Highway Traffic Safety Administration (NHTSA) (the “HD Rule”) at 75 FR 74152. These comments note that the NHTSA’s HD Rule should include the NGV multiplier Congress mandated for light-duty vehicles.