If the vehicle can determine rear seats are not occupied, no warnings are required. The rule applies to passenger cars, trucks, most buses (not school buses) and multi-purpose passenger vehicles ...

But why would South Carolina and so many other states forgo seat belt requirements on school buses when they’re required in most other passenger vehicles on the road? After all, accidents do happen.

Most school bus passengers are also at a lower risk of being ejected because of compartmentalization. In our passenger cars and trucks, seat belts are meant to protect us from being ejected.