What is considered a violation of law when operating a school bus?

Allowing anyone to stand in the stepwell is considered a violation of law when operating a school bus because it compromises the safety of both the passengers and the driver. The stepwell is the area where students enter and exit the bus, and having someone standing there can obstruct the driver's view and create a risk of injury during bus stops or turns. Regulations are in place to ensure that all passengers remain seated while the bus is in motion, promoting a safe environment on the bus. This is especially important in a school bus setting, where young children are often present, and securing their safety is paramount.