(a) We do not regulate the type of vehicle you use to transport children, although we recommend that you check with the Texas Department of Motor Vehicles or refer to the federal motor vehicle safety standards regulating transportation to and from school and your operation.(b) For the purpose of this chapter, we categorize vehicle types as:(1) General purpose vehicle--passenger vehicles as defined in the Texas Transportation Code §545.412, and buses that do not meet the federal motor vehicle safety standards for school buses or multi-function school activity buses (MFSAB);(2) Small school bus--school buses and MFSABs that meet federal motor vehicle safety standards for school buses and MFSABs respectively and have a gross vehicle weight rating (GVWR) of 10,000 pounds or less; and(3) Large school bus--school buses and MFSABs that meet federal motor vehicle safety standards for school buses and MFSABs respectively and have a GVWR of greater than 10,000 pounds.(c) All vehicles must be maintained in safe operating condition at all times.