24:06:07:06Windows, windshield, and glass.

All window openings and glass in the windows and doors of a school bus must comply with section (A) of the section entitled "Windows" on page 78 of the National School Transportation Specifications & Procedures, May 2025 Revised Edition (NSTSP). In addition, the following provisions apply: (1) For Type B, C, and D buses, as defined on pages 407 to 408 of the NSTSP, the driver's window, the first window on the left after the driver's window, the first window after the service door, and the windows in the service door must be frost-free (thermal) glass; and (2) For Type A-2, B, C, and D buses, as defined on pages 407 to 408 of the NSTSP, the lower portion of the rear emergency door must have an exposed glass area of not less than three hundred fifty square inches and must be covered by a protective screen inside.

Source: 22 SDR 61, effective November 9, 1995; 30 SDR 181, effective May 20, 2004; 33 SDR 152, effective April 5, 2007; 38 SDR 58, effective October 17, 2011; 44 SDR 43, effective September 13, 2017; 53 SDR 22, effective September 8, 2026.