early 1990s, Mid Bus, an Ohio manufacturer specializing in small school buses, purchased the tooling and product rights to build the Busette from Wayne Corporation, and produced Busettes for a few more years. In modern times, more small school buses are based upon cutaway van chassis than any other type. Most school bus body builders also produce models for non-school use, often called a "commercial minibus". Manufacture As produced by the first stage (van) manufacturers, a cutaway van chassis generally features a van front end and cab design. The body ends immediately behind the driver and front passenger seats, and is usually covered by temporary plywood or heavy cardboard material for shipment to the various second stage manufacturers. It was soon known by the name "cutaway van chassis" in recognition of this feature. Higher-GVWR vehicles are derived from medium-duty truck chassis. Second stage manufacturers, known in the industry as "body-builders," build such products as bus and truck bodies, motor homes, and other specialized vehicles. Neither their product, nor the first stage portion, legally defined as an "incomplete motor vehicle" under the Federal Motor Vehicle safety Standards (FMVSS) in the US, are fully compliant with requirements for a complete motor vehicle. Neither portion can be licensed or operated lawfully without the other. Many cutaway chassis are equipped with dual rear wheels and can handle greater weight loads than the basic vans upon which they were based. Design overview Ambulances In the United States, the 1973 National EMS Systems Act, which was passed by Congress in 1974, and implemented four years later (in 1978), required that communities receiving federal funds for their programs had ambulances that met new federal specifications. The regulations included minimum width and other requirements which virtually eliminated car-based vehicles. The last American-made car-based ambulance was built in 1978. The United States General Services Administration has published a standard for ambulance construction, KKK-A-1822F, which has been adopted by many states and localities, including Nebraska, Illinois, Mississippi, Oregon, and Decatur County, Indiana. Designs based upon the cutaway van chassis with modular bodies are defined as Type III. (Type I uses pickup truck chassis and Type II are straight conversion of van with a raised roof rather than a modular body.) This standard is due to be withdrawn in 2015 in favor of NFPA 1917. Many of these models have access between the driver and the patient care area, which for