§ 393.60 Glazing in specified openings.

(a) Kind of glass. (1) Glazing utilized or installed in the windshield, window, door, or any other opening into a bus, truck, or truck tractor, except vehicles engaged in armored car service, shall conform to the requirements contained in the “American Standard Safety Code for Safety Glazing Materials for Motor Vehicles Operating on Land Highways,” with the effective dates shown in paragraph (a)(2) of this section.

(2) Table of Glazing Requirements and Effective Dates:

(b) Windshield condition. Every motor vehicle windshield shall be free of discoloration or other damage in that portion thereof extending upward from the height of the topmost portion of the steering wheel, but not including a 2 inch border at the top and a 1 inch border at each side of the windshield or each panel thereof, except that discoloration and damage as follows are allowable:

(1) Coloring or tinting applied in manufacture, for reduction of glare;

(2) Any crack not over 1/4-inch wide, if not intersected by any other crack;

(3) Any damaged area which can be covered by a disc 3/4-inch in diameter, if not closer than 3 inches to any other such damaged area.

(c) Use of vision-reducing matter. No motor vehicle may be operated with any label, sticker, decalcomania, or other vision-reducing matter covering any portion of its windshield or windows at either side of the driver's compartment, except that stickers required by law may be affixed at the bottom of the windshield, provided no portion of any label, sticker, decalcomania, or other vision-reducing matter may extend upward more than 41/2 inches from the bottom of such windshield.

[33 FR 19735, Dec. 25, 1968, as amended at 41 FR 53031, Dec. 3, 1976; 44 FR 25457, May 1, 1979; 44 FR 31982, June 4, 1979]