24:06:07:05.  Sound and thermal insulation. Sound and thermal insulation for a school bus must meet the following requirements:

          (1)  The side, roof, front, and rear body panels, including the corner and the roof bows, must be completely insulated to deaden sounds and vibrations and to reduce heat transfer;

          (2)  The insulation materials must be fire-resistant, UL approved, with minimum R-value of 5.5. Insulation must be installed to prevent sagging.

          Source: 22 SDR 61, effective November 9, 1995; 38 SDR 58, effective October 17, 2011.

          General Authority: SDCL 13-29-2, 13-29-6.

          Law Implemented: SDCL 13-29-2, 13-29-6.