South Carolina's seat belt law requires, with few exceptions, that every driver and every occupant of a motor vehicle being operated on a public street or highway be fastened into a safety belt.
However, there are many other states in which back seat passengers are not required to wear seat belts, or exceptions are made for those traveling in livery cabs or other public transport vehicles. This lends to the erroneous assumption that backseat passengers are somehow safer than those seated in the front.
For years, this was true. It's why the front passenger seat position was often referred to as the "death spot." Those in the front were simply closer to the impact of the crash, and often had few protections, whereas at least those in the back had the front seat to slow or stop their ejection.