[Federal Register Volume 76, Number 206 (Tuesday, October 25, 2011)]
[Rules and Regulations]
[Page 65971]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-27502]


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DEPARTMENT OF TRANSPORTATION

National Highway Traffic Safety Administration

49 CFR Parts 523 and 535

[NHTSA 2010-0079; EPA-HQ-OAR-2010-0162; FRL-9455-1]
RIN 2127-AK74


Greenhouse Gas Emissions Standards and Fuel Efficiency Standards 
for Medium- and Heavy-Duty Engines and Vehicles

AGENCY: National Highway Traffic Safety Administration (NHTSA), 
Department of Transportation (DOT).

ACTION: Correcting amendments.

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SUMMARY: This document contains corrections to the final rule 
regulations (49 CFR parts 523 and 535), which were published in the 
Federal Register of Thursday, September 15, 2011 (76 FR 57106). The 
regulations established fuel efficiency standards for medium- and 
heavy-duty engines and vehicles, as prescribed under the Energy 
Independence and Security Act (49 U.S.C. 32902(k)(2)).

DATES: Effective Date: November 14, 2011.

FOR FURTHER INFORMATION CONTACT: Lily Smith, Office of Chief Counsel, 
National Highway Traffic Safety Administration, 1200 New Jersey Avenue, 
SE., Washington, DC 20590. Telephone: (202) 366-2992.

SUPPLEMENTARY INFORMATION: 

Background

    NHTSA and EPA published in the Federal Register of September 15, 
2011, final rules to establish a comprehensive Heavy-Duty National 
Program that will increase fuel efficiency and reduce greenhouse gas 
emissions for on-road heavy-duty vehicles, responding to the 
President's directive on May 21, 2010, to take coordinated steps to 
produce a new generation of clean heavy-duty vehicles.

Need for Correction

    As published, the final regulations inadvertently inserted a new 
definition for ``base tire'' in 49 CFR part 523 instead of 49 CFR part 
535. The new definition was intended to be applied to heavy-duty 
vehicles. It was not intended to replace the definition of ``base 
tire'' for light-duty vehicles, as its current location would suggest. 
To correct the mistake, NHTSA is moving the definition to its original 
intended location in 49 CFR part 535, and adding the words ``for heavy-
duty vehicles'' to alleviate any confusion. The previous definition for 
``base tire'' for light duty vehicles will be restored, and the words 
``for passenger automobiles, light trucks and medium-duty passenger 
vehicles'' will be added.

List of Subjects in 49 CFR Parts 523 and 535

    Fuel efficiency.

    Accordingly, 49 CFR parts 523 and 535 are corrected by making the 
following correcting amendments:

PART 523--VEHICLE CLASSIFICATION

0
1. The authority citation for part 523 continues to read as follows:

    Authority: 49 U.S.C. 32901, delegation of authority at 49 CFR 
1.50.

0
2. In Sec.  523.2, revise the definition of ``Base tire'' to read as 
follows:


Sec.  523.2  Definitions.

* * * * *
    Base tire for passenger automobiles, light trucks and medium-duty 
passenger vehicles means the tire specified as standard equipment by a 
manufacturer on each vehicle configuration of a model type.
* * * * *

PART 535--MEDIUM- AND HEAVY-DUTY VEHICLE FUEL EFFICIENCY PROGRAM

0
3. The authority citation for part 535 continues to read as follows:

    Authority: 49 U.S.C. 32902; delegation of authority at 49 CFR 
1.50.

0
4. In Sec.  535.4, add a definition of ``Base tire'' to read as 
follows:


Sec.  535.4  Definitions.

* * * * *
    Base tire for heavy-duty vehicles means the tire specified as 
standard equipment by a manufacturer on each subconfiguration of a 
model type.

    Issued: October 18, 2011.
Christopher J. Bonanti,
Associate Administrator for Rulemaking, National Highway Traffic Safety 
Administration, Department of Transportation.
[FR Doc. 2011-27502 Filed 10-24-11; 8:45 am]
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