[Code of Federal Regulations]
[Title 49, Volume 6]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR537.4]

[Page 106]
 
                        TITLE 49--TRANSPORTATION
 
                   CHAPTER V--NATIONAL HIGHWAY TRAFFIC
                    SAFETY ADMINISTRATION, DEPARTMENT
                            OF TRANSPORTATION
 
PART 537_AUTOMOTIVE FUEL ECONOMY REPORTS--Table of Contents
 
Sec.  537.4  Definitions.

    (a) Statutory terms. (1) The terms average fuel economy standard, 
fuel, manufacture, and model year are used as defined in section 501 of 
the Act.
    (2) The term manufacturer is used as defined in section 501 of the 
Act and in accordance with part 529 of this chapter.
    (3) The terms average fuel economy, fuel economy, and model type are 
used as defined in subpart A of 40 CFR part 600.
    (4) The terms automobile, automobile capable of off-highway 
operation, and passenger automobile are used as defined in section 501 
of the Act and in accordance with the determinations in part 523 of this 
chapter.
    (b) Other terms. (1) The term loaded vehicle weight is used as 
defined in subpart A of 40 CFR part 86.
    (2) The terms axle ratio, base level, body style, car line, combined 
fuel economy, engine code, equivalent test weight, gross vehicle weight, 
inertia weight, transmission class, and vehicle configuration are used 
as defined in subpart A of 40 CFR part 600.
    (3) The term light truck is used as defined in part 523 of this 
chapter and in accordance with determinations in that part.
    (4) The terms approach angle, axle clearance, brakeover angle, cargo 
carrying volume, departure angle, passenger carrying volume, running 
clearance, and temporary living quarters are used as defined in part 523 
of this chapter.
    (5) The term incomplete automobile manufacturer is used as defined 
in part 529 of this chapter.
    (6) As used in this part, unless otherwise required by the context:
    (i) Act means the Motor Vehicle Information and Cost Savings Act 
(Pub. L. 92-513), as amended by the Energy Policy and Conservation Act 
(Pub. L. 94-163).
    (ii) Administrator means the Administrator of the National Highway 
Traffic Safety Administration or the Administrator's delegate.
    (iii) Current model year means:
    (A) In the case of a pre-model year report, the full model year 
immediately following the period during which that report is required by 
Sec.  537.5(b) to be submitted.
    (B) In the case of a mid-model year report, the model year during 
which that report is required by Sec.  537.5(b) to be submitted.
    (iv) Average means a production-weighted harmonic average.
    (v) Total drive ratio means the ratio of an automobile's engine 
rotational speed (in revolutions per minute) to the automobile's forward 
speed (in miles per hour).