37 Tex. Admin. Code § 14.52
At a minimum, the following list of lighting and warning device equipment on a school bus shall be maintained at a level equal to or above the standards found in the specification requirements as set forth in the department's Texas School Bus Specifications or the previous publications of the Texas School Bus Specifications by the Texas Building and Procurement Commission (formerly the General Services Commission), which was current during the year of the school bus' manufacture, including the following:
Source Note:The provisions of this §14.52 adopted to be effective July 7, 1999, 24 TexReg 5023; amended to be effective March 9, 2004, 29 TexReg 2378.