[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR393.80]

[Page 430]
 
                        TITLE 49--TRANSPORTATION
 
                      DEPARTMENT OF TRANSPORTATION
 
PART 393_PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION--Table of 
Contents
 
              Subpart G_Miscellaneous Parts and Accessories
 
Sec.  393.80  Rear-vision mirrors.

    (a) Every bus, truck, and truck tractor shall be equipped with two 
rear-vision mirrors, one at each side, firmly attached to the outside of 
the motor vehicle, and so located as to reflect to the driver a view of 
the highway to the rear, along both sides of the vehicle. All such 
regulated rear-vision mirrors and their replacements shall meet, as a 
minimum, the requirements of FMVSS No. 111 (49 CFR 571.111) in force at 
the time the vehicle was manufactured.
    (b) Exceptions. (1) Mirrors installed on a vehicle manufactured 
prior to January 1, 1981, may be continued in service, provided that if 
the mirrors are replaced they shall be replaced with mirrors meeting, as 
a minimum, the requirements of FMVSS No. 111 (49 CFR 571.111) in force 
at the time the vehicle was manufactured.
    (2) Only one outside mirror shall be required, which shall be on the 
driver's side, on trucks which are so constructed that the driver has a 
view to the rear by means of an interior mirror.
    (3) In driveway-towaway operations, the driven vehicle shall have at 
least one mirror furnishing a clear view to the rear.

[48 FR 57139, Dec. 28, 1983]